Great throne! I have a lot of back issues and so far is a very sturdy and comfortable throne. The felt material on the seat also makes it cooler to sit on. No negatives for me regarding this product. BUT it does swivel/doesn't lock in place and it moves/bounces a bit when you first sit on it. It doesn't bother me, in fact I prefer that, but it may not be for everyone. My suggestion would be to got to Sam Ash or a music store that has them on display try it out. The other throne that was similar but didn't have the hydraulics was the Pork Pie brand.