Prior to getting this mattress, I had heard so many positive reviews about Memory Foam mattresses. I had been experiencing back pains for quite some time and believed the mattress would have a significant affect on it. The first few nights of sleep were incredible. The back pain went away and I was sleeping great. However, after the first 4-5 days the foam didn't seem to expand any longer and the mattress felt stiffer. My back pains are back and I completely regret buying this mattress. I wouldn't recommend this to anyone.