It is much firmer than you would think it would be. I like it that way, but am mentioning it in case you don't like firm. It has a very nice outer cover. I was going to get the 11 inch but read a review saying that was a little too thick for standard sheets. 8 inches is right. Of course, you need something under it - I used our old Select Comfort bottom support and the whole thing is in our old water bed frame. It's just the right height this way.I made a boo boo by unwrapping it (a king size) on the front porch and had to wait for husband to come home to help me drag it through the house! I suggest you unwrap it in the room you are going to put it in.