This throne is solid. It has stood up to relentless gigging and practices, being thrown around, collapsed and set up, knocked over, had drinks poured on, pretty much everything has happened to this throne and it doesn't seem to want to give up and break. However the bach rest does feel flimsy, and more like one taken from an office chair rather than designed for a drum throne. Luckily it's detachable and other than this I would say this is well built.
Stemming from its well build frame is its stability and yes, this thing is as stable as it is solid. once set up and locked into place the throne doesn't rotate unless you want it to, nor does it rock. after about a year of constant use I did notice some wobble but it then disappeared one day.
My actual issue I had was this is that its like a rock, literally to sit on it feels extremely hard for something made of foam and as such is not the most comfortable throne to use.
Looking past this though for the price it's at, it's a wise choice I would recommend.