I can tell you this, like a Hein-Werner jack, they are real quality.
About 2 years back got the Hein-Werner 3 ton... Man, wish I could come up with the words and phrasing to describe how slick the valving works raising and lowering a car.
The only other floor jack I'd ever consider now is the Milwaukee, however @ 800 +, pretty sure I will never need one.
Just saying
Pep