Overall, this is a 4.5 star mattress for one particular reason. Medium is very firm. We should have bought a soft. Thankfully, we had a memory foam topper from our last bed and when we combined them... ahhhh! I have never slept so well.The well made mattress was heavy but very easy to install, hardly off-gassed at all, and has a beautiful cover. Yes, you can rotate and flip this mattress! That was important to us. I would strongly recommend the hypoallergenic mattress cover to keep this investment in tip-top shape for years to come.As far as value is concerned, this mattress is excellent. At 11" it is thick enough to hold its shape and thin enough to allow for the softer top to be added without undue height. In short, that means our sheets fit beautifully and the topper isn't shifting all over.Buyer beware. No returns. Read the reviews and buy "soft" if you want any give to the mattress when sleeping.