Waited to write this review. Finally decided after much research to buy this mattress due to fractured ribs and a broken down mattress that was killing me pain wise. Have only had this mattress for 3 weeks and am now able to sleep on my side and reap the full benefits (research said buy soft if you sleep on your side). What you need to know is that "soft' is not like a marshmellow. The mattress is still firm enough. I truly believe my ribs would still be a problem were it not for this mattress.I ordered on a Sat. eve and recieved the following Tues. AM. Instructions say after unrolling mattress let it sit for 24 hours. My mattress was ready to use in 1 hour.