Humanscale Ballo - Multipurpose Office Stool Black

The concept, design, build, quality, and execution of this product is excellent, but for one major flaw: height adjustability.To be fair, the product description DOES state that this stool is intended for SHORT TERM seating. So for quick, portable, TEMPORARY (emphasis) task seating I guess it DOES fit the bill. It's light, comfortable, and not too "roll-y," with just the right about of wobbliness to engage your core but not so much as to make you think you're sitting on a seagoing vessel.But what office worker ever sits on anything for less than an hour at a time, oftentimes much more?So unless you happen to fall ergonomically perfectly into its proportions, do not try to use this for extended seating. As anyone who sits in a chair for a living (that's most of us) can tell you: small adjustments in height make a BIG difference. Forearms and thighs should be level, etc. which cannot be achieved here. So unless you are of the ideal height (which I reckon to be around 5' 7") you will not be happy.But if they can figure out how to add height adjustability they will have a winner.