I'm a guy who likes to be on the bottom, but my wife's knees have taken a beating from high school sports. This stool ROCKS, having given us the best of both pleasure and comfort. It can't be left out like furniture like the site claims, though it is easily collapsible. It also requires a bit of steadying from me, which was weird but not bad; just be sober the first time you try it. We were even able to do the reverse cowgirl, which has never worked well before for us. It was totally worth the money, and I can't wait until we use it again!! YEEHAW!!