I bought this on recommendation from my chiropractor. I recently began a program to strengthen my ankles (which are so weak) and improve my balance (which is terrible). The program that I am doing at home consists of standing on one foot on this inflatable balance board for 30 seconds, then switching legs. It is hard, but very effective. Afterward, I do the same thing on a foam pad.I've been using this every day for about a month, and it is extremely durable. It came already inflated and even has a bonus pump. Even with using it every day, I haven't needed to add any extra air. One side is smooth (which is the side I stand on) and the other side is kind of pointy (which prevents it from sliding and slipping).I have lately also been using it behind my back when I have to sit in a desk or kitchen chair for a prolonged period of time - I find that it provides excellent lower back support and I'm noticeably less sore/in pain when I get up. If you have any questions, I'll do my best to help. Please consider leaving me feedback below if you found this review helpful.*I have noticed that several reviews I have written on items purchased through Amazon have had the "Verified Purchase" removed incorrectly and as a result are no longer visible, which is likely happening to other people as well. When you read reviews, be sure to sort by 'All reviews' since there is obviously a bug in the system and many helpful and detailed reviews are now hidden.