My husband and I were desperate to upgrade from our old, uncomfortable queen spring mattress to a king to make room for our 2 spoiled dogs and my growing baby belly. We didn't think this was an option as we didn't want to spend an arm and a leg. I found this mattress on overstock.com and it was such a great price we took the risk. We are so happy with our purchase. I did have a transition period of about 10 days where my lower back was very sore on waking....I think it was so stiff and tight from our horrible previous mattress that switching to memory foam actually provided a stretch to my lower back, resulting in the soreness. I am happy to say the soreness is now gone and we are sleeping great. No more aches and pains in the morning and plenty of room for our dogs! I also don't feel my husband or dogs moving around during the night, and I can get up without disturbing them as well.