Interesting, but it looks like it would take longer/is more compilcated than a jack and stands, and doesn't provide any advantage over jack stands.
Maybe if they made one that lifted the car like 4 or 5 feet in the air for <$1000... but for $2000 (only $300 or so more than this deal) you can get a real lift.
Acutally:
http://www.americasprideonline.com/2...1-.ViewProduct
There's a 2-post 7,000lb lift for the same price as that giant screw jack!