My wife was really struggling with our old mattress, so after some hunting around I settled on getting her to look at this site. Lots of choice and mattress tech, but she found it easy enough to find several that she liked, before she eventually settled on this one (discounted at the time).Myself, I could get a solid 6 hours sleep every night, on a rough flint beach in a storm....Placed the order for a saturday delivery and was delighted with the service and updates throughout.We've been enjoying comfortable sleep ever since (about a week and a half) and my wife's back is feeling the benefit already.This is a deep mattress and supports very well, whether a back or a side sleeper. There's a comfortable memory foam layer over the top, which softens contact points really well.It is one sided, so is to be rotated only. At least you're not likely to put your back out having to turn it over!We're really happy with it, and it's excellent value for money too.