First we ordered this mattress in "firm" and let me tell....it was just that. It was horribly uncomfortable and did not help my already bad back. We decided to try the "medium" and OMG...it was amazing. We havent slept so good in years. We have had it for almost a month now and still so comfortable. Still offers support hit soft enough to not feel like you are sleeping on cement.  Only downfall is the return process for the old mattress. Make sure you call and speak to a representative and set up the return. The online process is not the correct way and FedEx will not take the mattress out of the box. Plus they charge to return.....Wayfair uses a different company that picks up from your door and they dont charge so you will get you full refund. Speak to a rep!!! Even if it takes hours to get through. I had to call multiple days because the wait times were hours long, but eventually got though and glad I did.