The mattress is very comfortable, I maybe should have gotten the medium instead of medium firm but I am definitely sleeping better on this mattress compared to my last mattress. While it’s firm, inside the top of mattress is a layer of padding that conforms to my body which cradles me but doesn’t sink me in. Both me and my bf have noticed our backs are no longer stuff and aching in the morning. We have also noticed that while it doesn’t eliminate transfer motion from one of us moving, it is reduced so we disturb each other less. Standard queen size sheets fit nicely. though the mattress is quite thick.