Want a good guitar seat - you found it!
Everything works perfectly. You get nothing less than for eur 400.- for example. I've had one for 4 x more expensive, so I have a good comparison.
This is not the best for everyday giging and moving around as it does not allow to fold it in any way and takes a lot of space in car. But in rehearsal rooms, permanent equipment on stages etc - very good!
The footrest could of have a tiny bit bigger radius but this is personal preference.
I've had 2 of folding stools and sold both very quickly. If the folded one has appropriate weight and folds as needed, then it must be perfect fit for person, which is very mush 50/50 situation, rather 80/20 not to fitting. If the folded one has more options to setup as you need, it is more likely very heavy and does not fold enough to spare space. In last case I would already prefer the Thomann stool as it takes no more space and weighs no more. But this stool costs way less for 100%!