How does this compare to the taylor of old bond st cologne? I noticed there is a price difference. is it better?

I tried Taylor's first , this is better in my view. I love Sandalwood and its hard to find. I'll stick with George Thumper.

What age group would you say this cologne belongs?

I believe it is appropriate for any age.

Does the top of the bottle unscrew?

The top does not unscrew. It slides off to reveal an atomizer that is crimped to the bottle. It is a wonderful scent that I have used for many years. Others have commented on it as well. I have found that anything from Trumper can be relied on to be a high quality product. Enjoy!

What size bottle is this?

The shipping weight is 5.6 oz so the product itself is probably 3.5 oz. my bottle has lasted a few months now and I use it regularly but I don’t overdo the application... much to the relief of those around me. Too much of a good thing is a bad thing.