I am rating as a 2 because the ad is very misleading.  You are not getting a 5 1/2" Gel Memory Foam pad but a 4" foam pad with a fiber mattress topper.  The topper which is supposed to bring the overall height to 5 1/2" is 1/2" at best.  There is absolutely no way for the fiber topper to ever measure an 1 1/2".  Fortunately, we had an 1 1/2:  fiber mattress topper (so we know they are available) which we had to use to obtain the comfort we were seeking.    A lot of money for not getting what's advertised.  We did not return the Gel Memory Foam as we chose not to hassle with it.

Pros: Gel Foam is comfortable
Cons: Fiber Mattress is not as advertised - not even close