I use one of these at work and it is wonderful. There are so many different sitting positions that it can support; kneeling, not kneeling, twist it around to ge

I use one of these at work and it is wonderful. There are so many different sitting positions that it can support; kneeling, not kneeling, twist it around to get a slightly different spine alignment. It offers a lot of flexibility for someone who feels the need to adjust posture regularly to stay comfortable. It is also quite compact, which I also like.