Initially the mattress was great and comfortable, after about 18 months the body depressions on the mattress developed. This occurred on both my side (250 lbs) and my wifes side (140 lbs). The body depressions became so bad that I developed back pain from it. At about the 3 year mark we contact Simmons for the warranty, after review they claimed that the warranty is void due to a hot chocolate stain near the foot of the bed. They also claimed that the bod depressions were not bad enough, I guess sleeping in a valley is normal for Simmons. After this experience, I can assure you that we will never purchase anoth Seely-Simmons mattress and will advise friends and family against it.