Ergotron – LX Monitor Arm, Single Monitor Desk Mount – fits Flat Curved Ultrawide Computer Monitors up to 34 Inches, 7 to 25 lbs, VESA 75x75mm or 100x100mm – WhiteBIFMA LEVELBIFMA LEVELBIFMA LEVEL

I've used a few cheap monitor arms in my life, and they are generally ok if you want to leave your monitor in one spot, but barely ok. This arm is expensive, but honestly for something you can keep using its worth the premium. I always thought a monitor arm is a monitor arm but this product changed my perception of that.This arm has very smooth motion, very easy to move it around and dial in the right setting you need for the situation. Once you got it positioned it is extremely sturdy and stays where you set it. You can continually adjust this thing with ease, no need to mess with tension screws or jank actions.It looks slick in matte black, which is a lot nicer than the plastic or shiny materials used in other mounts. Not really a big deal but its sometimes the small details.Installation was easier than any other arm i've installed. The parts are laid out properly and the way it goes together in parts is a lot more smooth than other designs. Its pretty much 3 lego pieces and you're done, the base is just a base so its not top heavy while you're trying to secure it to your desk. Monitor cant be nut locked in place so you have to remove the entire last segment to replace your screen, but that adds to the stability of the monitor as it doesn't shake at all.Having a screw to disable rotation is great for my OCD tendencies, you can get very slight rotation but getting it fully strait takes zero effort, no need for rulers.

All in all this is a great articulating arm. It's very solidly built, fairly well thought out, and once set up it adjusts easily. When I unpacked, I was surprised at how heavy it was -- it is really solid. There are a couple of small caveats but they aren't enough to diminish my rating.First, the adjustment for the counter-spring for the vertical movement is next to impossible. The design calls for inserting an Allen wrench into the area behind the joint where the monitor mounting plate is attached to engage the rod which controls the spring tension. First, it is pointless to try the adjustment without the monitor in place since it is the monitor's weight one is attempting to counterbalance, and that means that the monitor will make it impossible to see into the recessed area where the wrench needs to go. There is nothing in there to guide the wrench so it is practically impossible to fit it into the hex-head on the end of the rod. Meanwhile, with the monitor and other parts of the arm in the way one cannot just continually turn the wrench -- one must turn it, then remove it and reorient it before inserting it again -- so even getting lucky at getting the wrench seated the first time won't help much. Lucky for me that the factory setting was almost perfect for my monitor so I didn't have to monkey with this that much. It is a bad design and I hope they are smart enough to change it for future offerings.My second caveat is really minor, but it just seems like they could have easily handled it better. One installation option involves installing the arm on a surface by running a bolt in the platform of the arm through a hole in the table's surface and then using a wingnut to clamp a small plate underneath the mounting surface. This works well but the bolt is very long -- I'm not sure why they need a bolt that long. In my case, there was a drawer beneath the surface where I was mounting it and the excess length of the bolt interfered with the drawer. One option to fix this is to use a shorter bolt -- that might not be easy to do, however.Where the bolt fits through the platform of the arm, it drops into a square hole and the bolt has a square section at the top of its shaft which locks into that square hole to keep the bolt from turning. It might not be that easy to find a replacement bolt with that square section as I suspect that it is not a standard part. Another option is to take a hack saw and cut off the excess portion of the bolt. Unless there is sufficient room in the mounting area to accommodate a hack saw, this would entail mounting the arm, marking the place to cut the bolt and then removing the arm to retrieve the bolt (and one would likely need a vise to hold the bolt while cutting). It would have been easy to avoid all of this, however. The bolt itself is at the bottom of the hollow upright tube which the arm is mounted on -- if they had just welded a nut to the platform and threaded the bolt through a lock-nut, then the welded nut, it could be adjusted to whatever height was desired before installing. To avoid having to install, mark the bolt, and then remove for adjustment, one could likely just estimate the length needed based on the surface on which it is to be mounted (to be fair, one could do the same with the hacksaw method but with the downside of needing to obtain a new bolt if the estimated length turned out to be too short).One last complaint involves the provisions for cable control -- the cavity in the arm for passing the cables is a little awkward to use and seems a bit small. It works well enough, however -- the real problem is that there is nothing similar for the upper arm and since a little slack is needed in the cables to allow for moving the monitor around, angling the screen, etc., one is faced with having cables drooping down behind the monitor. I alleviated this a bit by using some velcro ties to hold the cables to the upper arm so that the slack portion is only from the end of the arm to the monitor.These are minor quibbles, however, and only affect the setup. Once the arm is in place and adjusted, it works great, easily holds my 22 inch monitor, and I am very happy with it.

This mount is perfect for what I bought it for - having a lot of versatile movement of my monitor, so that it can be adjusted frequently. This mount is not a set-and-leave type, where you need to set it once and stick with that location. You can adjust it as much as you want, and it holds position. The only adjustment that may take some time to make is the position of the arm on the pole, because a ring underneath the arm must be adjusted to maintain the height position. However, the height range without adjusting the arm is already pretty significant, and I do not see that it would be necessary to adjust the arm height on the pole very often. Adjustments are smooth and they stick - I do not have problems with the monitor falling out of position after I adjust it.The other reason that I picked this particular unit (besides the ability to adjust frequently and easily) is the tall pole. This provides a larger range of movement, and if your monitor is on the upper end of the rated size scale, you will probably need it. I was really happy about this choice, and although I have not really needed that extra height yet, I am really happy that I have the potential for it.When the mount arrived in the box, my first impression was that the parts were all solid and well-made, heavy construction. Assembly was really easy (no-brainer) and when put together, it was clear that the quality construction was as solid as I thought, and all parts worked smoothly together and fit easily. Ergotron did not stinge on any of the parts - they are all solid, good quality.I mounted it to the desk with the clamp, instead of drilling holes, because the desk will be moved to a new apartment soon, and I want to have flexibility of placement in the new place. The clamp provided good stability for my monitor, and I have had no problems with vibrations or the clamp slipping while I am adjusting. I may leave it in the clamp even after moving, since I have not had any problems with it.I was torn about purchasing the dual mount so that I could have the flexibility of setting up dual monitors in the future, but ultimately decided not to. Now that I have the mount, I realize that I can buy the same mount again and mount both arms on a single pole to achieve the same setup as the dual mount system. Or I can set the mounts side by side. So, I feel I made the right choice and I am not limited.Overall summary: highly recommend!Pros: quality parts, solid construction, easy assembly, easy adjustment, adjustments hold after you make them, extra height range with tall pole, choice between clamp or through-desk mounting, rotates freely between portrait and landscape viewing (fun fact - this rotational direction is not limited at all except by your cables that will wind up if you continue to rotate - you could keep rotating indefinitely if your monitor were cordless).Cons: takes a little more time to adjust the height position of the arm on the pole (this is no big deal for me). Also, having a wall directly behind the mount will limit movement away from you to some degree, because the arm will be restricted by the wall - you will not be able to retract it as far against the wall as you would if the desk were free-standing. However, it seems obvious that you will not be able to achieve the full range of movement if there are obstructions.