A little background first: My wife and I have owned this mattress for 8 months and sleep an average of 8 hours per night on it. I weigh 200 pounds and she ways 115 pounds. Prior to this mattress, I had an Ashley memory foam mattress. We are both generally side-sleepers, but have tried different positions in an effort to accommodate this mattress.Both of us have had a terrible time with this mattress. We both have been waking up with back pains nearly every morning. I think this is mostly due to the "sponginess" of the foam. It pushes back quite a bit and thus makes our bodies lie unevenly. Where most mattresses have different levels of support for the different parts of your body, this one seems to be uniform throughout. I've also noticed that it has begun form soft spots where we sleep (we have rotated the mattress twice so far).Ultimately, I regret not taking advantage of the 100 night trial. We really wanted to give this mattress a chance, but it just didn't work out in the end.