Bought this for my tall upright bass player so he can sit and play on rehearsals. Stability is fine and the stool is sturdy and well constructed. One annoying thing is that a separate tool must be used for footrest adjustment, would have much preferred if that was also on a built-handle (high risk of loosing a small separate tool For example in live situations).
Other than that, my bassist reports that it’s quite comfortable and works well and that’s also my experience when trying it.