I have been using my Airpulse PK cushion for about 8 years now. I’m so glad I found out about this cushion. About 9 years ago I was dealing with a pressure sore and was working from home for about a year. With the cushion I was able to go back to work and work my normal hours. Aquila is a great company. I would recommend the Airpulse PK cushion to anybody that is in a wheelchair for long periods of time.