Has anyone had any relief using these types of pillows? I suffer from DDD, Osteoarthritis, Spinal Stenosis & Segmental Instability. I use an anti-gravity chair (which is wonderful) in the house. But I need some kind of relief while sitting at the computer and/or driving. As well if there were positive results about this type of cushion, it could be used on the seat of the scooters in the stores. Any suggestions would be greatly appreciated!!