Great quality feel to it, and very strong/sturdy. Looks amazing too. The adjustment mechanisms are sleek and well designed.
However, that strength comes at the cost of being a little heavier than other stools I've used. The feet also splay out wider than usual. Lastly, this is a tall stool - I'm 1.78m, and I need to set the Gravity FD to it's lowest height.
Despite these remarks, I think it is still the best stool in the 40 - 100€ price range, and it feels like it's going to last for years.