I don't have the Gypsy. I use my exercise ball. I was using a hard bench, DH offered to buy me a chair for Christmas. We even went shopping but I couldn't get my head around the price of what I liked. Then we realized I would need one of those hard plastic mats under it to protect the carpet from crushing.
We both hit on the idea of trying my exercise ball. It wasn't getting a workout anywhere else! And I had recently started using one at my desk at work.
So far, I like it, but have only used it a few hours in total. Obviously, I have to be really careful with the pins!
Just an idea. I do notice it makes me get up and move around more at the office at least.