ECR4Kids Sitwell Wobble Stool W/ Cushion

I'm an adult using this to sit at my work desk. I've used both folding card table chairs and inflatable stability balls to sit on, both of which were more comfortable than this. The main problem is the top is just not padded enough, you wind up sitting on the hard plastic rim and it's painful after 30 minutes or so. I put a pillow on top which helps but doesn't really solve it. I also find that once you sit on it, it doesn't really wobble at all, so the benefit of active movement and core engagement isn't really there the way it is on a stability ball or a swopper. On the plus side, I like that there's no assembly, it seems solidly made, the hydraulic adjustment works okay. The height range is good for sitting desks but not high enough for standing desks.