Good Evening Reviewers! I wanted to take my time and really sleep for a month or so on this Serta Perfect Sleeper Oasis mine is a Frim pillow top… And I absolutely have never had pain free perfect sleep like I have been having! I find it is great for back and side sleep which is my primary positions. When I first got it I did a jump test on it lol yep jumped up and down a few times and found to not lose my footing and the mattress being supportive. Which I thought was a good sign and nope not disappointed. I feel even pressured but just the perfect softness and not over heated as some mattresses make me. I highly recommend giving this firm mattress a try!