I have 3 of these - Love Them !!
I have a wood shop & our tables are higher than standard 30". These are perfect for detail work on shop tables. Your back isn't hunched over (& pain after couple hrs).  I didn't expect these to be as good as they are. It's something about how your legs are spread & the ability to work over a table & still keep your back upright. These are amazing, highly recommended for shops (especially w/ work tables).
Rating: 5 stars