Excellent pillow I bought one of these about 3 years ago, so bought a new one to replace my old one which still stays cold but has lost its puffiness.
Definitely recommend, good quality and stays cool.
Bought as an aid to cope with hot flushes. Although it is a good quality product and I can't fault that I am not sure it is an advantage. It suggests it aids a quicker deeper sleep. I have found no obvious differences. The gel is cool when you first lie on it but it doesn't stay cool for long and at the next flush have to turn the pillow round to find a reasonably cool area. Not what I was hoping for.
This is the 3rd one I’ve bought. Just would say a bit bulky at first but they do get worn in and wouldn’t put me off buying one as most pillows the same. Does what it says it does.