I'm used to a very firm mattress and was surprised that this had a slight bounce to it - guess I'm used to sleeping on cement! Seriously considered sending it back even with the hefty *** restocking fee, but decided to try it out for a week. I'm really glad I did. The mattress is firm although it does have a slight bounce when you lie on it and move. That being said, it is only slight and not like a trampoline. When you sit on the side of the mattress, the side does compress a bit. Overall, it is a comfortable mattress. I am a side sleeper and I no longer wake up with hip and back pain. It has a give to it which, I later found out, is actually the best mattress for side sleepers. I now no longer notice that springyness. The mattress is nine inches high and I like a thicker mattress so I got a 3 inch memory foam to make it thicker. I really only wanted it for the thickness and was afraid it might make the bed too soft, but it actually gave the mattress more support and stopped that bounce! I put the memory foam under my mattress pad. So all in all, I am quite happy with my purchase. For those wanting a firmer mattress, I would suggest the Simmons brand carried by Overstock. They have a couple of "extra firm" models. Like other reviewers said, delivery and set up was hassle free. And the Overstock customer service were very helpful in trying to help me find the ideal bed. Given all I've noted, I would recommend this bed. Especially for the price, customer service, and no delivery fee....!