I have one and I love it! I purchased it just before a weekend quilting "bootcamp". I took a class that ran Friday 6-12, Saturday 10-10 and Sunday 10-4. I have problems with my sciatic (sp?) nerve and figured I'd be in bad shape by Sunday afternoon. I came through it just fine! It really helped with this kind of pain as it allows for movement without compression. If you move to one side or the other the air in the cushion adjusts so you're not pressing harder on the side you're leaning towards. (I don't know if that makes sense or not.) I let my girlfriend try it one day when she was down quilting with me and she ended up buying herself one for use at work. I'd recommend it.