My wife and I had spent the last 12 years sleeping on a top of the line Sterns & Foster double pillowtop king-sized mattress. We are in our late-30s and I weight ~200lbs and my wife ~105lbs so there is a significant weight difference which you could clearly see from the divots on our old mattress even with regular turning and rotation. After a TON of research including looking at the $4,000+ well known name brand in the memory foam market we thought we would roll the dice on this mattress as it had lots of reviews from satisfied customers who had also done their research before purchasing. In summary, the mattress arrived within a week and expanded to its full size within 24hrs. There was no bad smell with our mattress as others had posted. My wife had been experiencing lower back pain for a longtime prior to switching to this mattress and I am happy to report her back pain is gone. The mattress is wonderful and we are both getting quality deep sleep at night. The mattress takes a few days to a week to get used to as its different from sleeping on a traditional mattress but the support and comfort it provides is great. After reading the reviews we chose the "soft" version of this mattress which will feel very firm to those who are use to sleeping on a soft/pillowtop traditional mattress. The memory foam supports your body which keeps you from wiggling around at night to get comfortable. You also don't disturb your partner if you get up in the middle of the night as the memory foam material absorbs that energy. We love the mattress and would highly recommend this specific mattress if you are considering making a change.