Great stool, arrived pretty much completely assembled to my surprise. All I needed to do was screw in the bolt to adjust/secure the foot rest.
I should note, the lowest seat height isn't that low - my feet would struggle to touch the floor, however this really isn't a point at all due to the very nice adjustable foot rest. It's just to illustrate the size of it. It's not small!!
The Stop N Go castors keep it secure and also give you the option to switch this function off so you can slide and spin to your heart's content and the upwards/downwards (I suppose, vertical -) action of the seat pad is very smooth too.
I would definitely recommend it.