If you want to wake up without pain. this is the one to buy plus you get a cover with it (very Nice). that goes on like a mattress protector cover so you don't have to try to stuff this monster into a cover and try to zip it. it is very heavy so def need 2 people to put on the bed but so worth the work. It does have an odor but I just couldn't wait to sleep on it so it didn't bother me. I woke up this morning without any backaches or hip pain.