Used this first time today. Oil change on two cars. Also bought low profile ramps so I can fit it under my 300C which hugs the road like a dust-buster. To lower as far as possible, simply purge pressure, press jack down by hand, then close release valve and it will hold itself down. I have a 20 gal. 150 PSI compressor. More than enough. Lift is VERY fast and yet very controllable. Top rubber pad is very good for protecting lift surface. Wish I had bought this long ago. I'll be using the heck out of it. Quality seems very good. It was necessary to replace the air inlet fitting with standard 1/4 inch adaptor. Instructions are in ENGRISH of course but anyone who will be using this jack will no doubt be able to noodle it out. Very simple and minor assembly. I was a bit disappointed that I received an allen wrench for the base assembly but not for the handle. No biggie. Get yerself one o these!
chuck 
