I've had the Ether lite XT for the last 3 years and it was super comfortable, I sent it in because it was loosing air, it turned out to be an issue with the construction of it so they were going to warranty it for me no questions asked. The "Problem" was they hadn't received any shipments of them so they were out of stock, for 9 months I waited for a replacement and never got one. With hunts coming up this Sept I had to request them to send me the Extreme mat which they did, they also sent me some other goodies for my extreme patience and promised to send me the Ether Lite XT when they came in, we shall see if this happens, then I will have a winter and a summer mat. Regardless of the horribly long wait and not receiving the mat of my choice they have done me pretty good and if I get the other mat someday soon I will be floored in a good way.
With all that being said these mats in my opinion are very comfortable and easy to adjust for side sleepers, I have never owned a mat that tops it!