Now that I've gotten a chance to use it I am writing a review: Price was good, and it arrived in minimal time. The instructions were minimal but clear and the jack was easy to assemble. The brackets for the wheels were preassembled and not symmetrical, but were easy to bend into alignment...
Finally got to use it today and it functions as designed. It's very useable But it raises and especially lowers much slower than I'd expected. That said the only other air jack I'd used before now was a much more expensive commercial model, but it was like Up & down quick, this one is not.
All in all I'd say it's adequate for my uses.