Great chair, exactly what I needed! I use it as a 'perching chair' in the kitchen because I can't stand up for long. It was easy to assemble, and is very comfortable to sit/kneel on. I need to concentrate when getting on and off so I don't catch a foot in the gap and fall. So it's probably not ideal for frail elderly people, but good for anyone with good balance, and great for me :-)
Sl Kneeling Ergonomic Office Chair