Excellent cushion for driving!
I bought this cushion to see if it would help on long drives, as I suffer from extremely painful leg cramps when driving long distances.  With this cushion, I drove 1600 miles and did not have one cramp.  It was also very confortable to sit on, though I did have to readjust my seat settings due to the added height. I plan to use this cushion from now on.
Rating: 5 stars