I bought this specifically for the firmness, and it’s *really* firm , and the weight rating , because both my husband and myself are on the chunky side...lol....  We are both side sleepers, and my husband has restless leg syndrome. He is constantly flailing around, although he knows nothing about it. My previous mattress was useless , I was woken every night over a dozen times with his constant movement. Since buying this mattress. I can’t feel any movement. I don’t know when he gets up in the night for his bathroom trips.  I’m sleeping comfortably, and therefore not crabby all the next day. My first decent sleep for years. I’ve not stopped talking about this mattress since I bought it .Sheer bliss .