Cush Comfort Cush Comfort Non-Slip Memory Foam Seat Cushion

I recently got the Cush Comfort Cush Comfort Non-Slip Memory Foam Seat Cushion - Spinal Alignment Chair Pad for Relief from Sitting Back Pain.I received this product for free. I ordered it for my husband who works in front of a computer all day and often has back aches. He has complained much less about his back since he started using it. The cushion seems to stay in place quite well and the memory foam gives a good amount of padding. His only complaint was that due to the shape of the cushion you must sit in just the right position for it to be comfortable rather than being able to shift throughout the day. Overall it seems to do the job it was intended to even if it doesn't quite allow the user freedom to change his sitting position very much.