Uncomparable for the money!
I purchased this cushion because I have a very bad back and also arthritis in my hips.  I first put air in it about 2 months ago and have been using it daily ever since.  I weigh 275 pounds and not a bit of air has leaked out in these past 60 days or so.  My cousin purchased an expensive cushion from her chiropractor for me and the air leaked out after two days.  This is a "must" buy for the quality and price.
Rating: 5 stars