I like this design so much that I have two of them, one with a backrest and one without.
It's not cheap but it's very well-made and sturdy, and both of mine have now lasted for years without any problems at all. Nothing has broken or worn, nothing has come detached.
The adjustability is excellent, and it is easy to find heights for both seat and footrest that work with acoustic guitar, electric bass, and double bass.
These stools are bulky and better suited to life in a music room or studio than going out gigging with them, but my vehicle is big enough that I can usually take one with me.