Question, the second video Mellow posted shows the operator using a drill/impact to raise and lower the lift, meaning it is a very strong worm drive etc.
The Video that Sadlsor posted shows the guy using a foot pedal, which would indicate hydraulic fluid.
I would personally trust the worm driven gear type over the hydraulic fluid type, simply because I've seen so many fluid type lifts (pitbull, J&S, Craftsman, Harbor Freight-Snap OFF tools) fail and toss bikes off.
Joe, does yours have any kind of safety stops once you raise it?
Just wondering.
Looks great for washing/detail stuff.
Except for all the dirt & mud he blew all over his Mini