I was hesitant to buy this mattress as it’s a “mattress in a box,” and I was unable to lay on it and try it out, but I am so glad that I did!!! I have SI joint pain (I’m only 39 :)) and our old mattress was killing by back. I truly have not slept this great in years! I wake up with no back/joint pain. If you’re on the fence, just do it! You won’t regret it.