Split King (Twin XL) ChiliPad Cube - Single Zone - Heating and Cooling Pad - Fits Your Existing Mattress, Delivers Precise Temperature Control, and Creates the Perfect Sleep Environment

This thing is fantastic. I set it at 95 degrees before bed, Then climb in it and the heat just encases your body. Then I turn it down to 89 and for the rest of my time in bed I am comfortable, none of the usual to hot take off the covers then man I'm cold and cover back up. A lot of people complain that it doesn't warm up to or cool down to the advertised temperatures but if they were to check the water temperature in the system nd not the bed they will find it is the correct temperature. The thing is it warms or cools your body after you get into bed and lay on the water tubes, it doesn't warm the bed like a electric blanket. But after you get settled into to bed you defiantly feel it. Other people complain about how loud it is. I have it on a table next to my bed and when cooling it isn't any louder than a small fan on low. If it is heating it makes no sound. One thing I found out is if you leave it on the floor it can overflow the reservoir. It is not supposed to do that and it isn't much water but you will end up topping it off more often. If you set it on a table so it is above the topper the problem is gone. So far I have had to top it off twice in 3 weeks with a couple of ounces each time. Unless you can't stand any noise in your room you will not be disappointed.Update: I purchased a second one, a queen size. This one has 2 compressors ( one for each side ) with duel controls. Surprisingly they are within 1 degree of each other when they are set at the same temperature. As far as noise again I say they aren't any louder than a small fan. When you are in bed you can't tell the difference in temperature from side to side. I can have my room at 80 degrees and set the cubes to 75 degrees and it is just right under the sheets. It is great to have your bed stay a consistent temperature while you are sleeping. They are expensive but to me they are worth every penny. If I run into any problems I will update this post but so far they work as advertised with no problems or leaks.

1st off I am not an employee or have no affiliation for Chili Technologies. I am a consumer and user of the Chilipad for the last 4 years.I think most of the persons reviewing the chilipad thought they were purchasing an air conditioning unit for their bed. Their is no refrigerant in the Chilipad like your A/C unit to cool the water. My experience is that the Chilipad is more like a heat exchanger, it becomes more effective the cooler the ambient air is. When your body temp is 98 degrees and the room is 85 degrees the unit is not that effective. However, if your room is 75 degrees the Chilipad is more effective.I sleep on a sleep by numbers bed and found myself waking up hot and turning the thermostat down to 68 degrees to compensate. Now with the Chilipad I only turn it down to 71 and am able to sleep through the night without getting hot.The product works and I sleep better with it, but I think Chilipad lacks in telling the consumer exactly what they are buying or how it exactly works.UPDATE: 10/13/14- This being my 2nd Chilipad, I wanted to add a few things after now having the new version for 3 months. I had my 1st Chilipad right at 4 years and made the mistake of putting tap water in it because I had run out of the distilled water. That is why I probably had to buy a new one. The tap water had bacteria in it and created growth and made the pad ineffective even with adding hydrogen peroxide to it. Make sure you only put Distilled water in your cube.Here are a few pros and cons of the new version of the cube and pad.ProsQuieterAutomatic shutoff after 10 hours of use.Customer ServiceConsLacks a single mode Heat or Cool selection. Would like to see that you can either just select Heat or Cool. I've had a few instances where the Heat kicks and wakes me up when the A/C kicks on.Remote Control-Some buttons are dual purpose and it is difficult to get them to select which function you want it to perform. I had issues with it loosing sync to the cube and the On/Off button not turning it on. I contacted customer service and they sent me a new remote within a week, but I still have issues with the new remote of being able to turn it on/off.Cool Down Time- The cooling time is not as effective as the 1st generation. I now have to turn the unit on about 30 minutes prior to going to bed for it to reach the desired temp. I believe this has to do with the lower speed fans on the unit that made it quieter.Water Capacity- I use my Chilipad every night and have to refill it usually every 6-9 days. The first generation seemed to have a larger tank and I only had to refill it every 15-17 days.My Recommendations to ChilipadWould like to see a remote with individual buttons for each function.Would like to see the unit to have programmable auto on/off times.Larger water tank.