I have the 5K version. Got it through Costco, drop shipped to my house. Best deal around. Saw it for as low as $999 but paid a little more, in the November pre-holiday season.
Pros: We all know the pros.
Cons: The interface with its base and concrete is just painted steel. This scrubs down to metal in no time. I get salty water drips on my concrete which I fear will quickly corrode the quickjack. First couple winters I had this, I kept it up and away, but last winter I had a project car up on it most of the time. But for heavy snowstorms I'd move my driveable project to an outside spot so my good car could stay inside, ready to go.
My cement garage floor was profesionally done and has a very slight dome shaped crown. The middle of the quickjack gets most of the weight, unladen. Not enough to be dangerous, but manipulating them under the car to line up the jacking points is a chore involving physics. Speaking of, it's hard on one's arm muscles to push something this heavy fore-and-aft under the car when approaching from the side. You "could" put it in one spot then move the car back and forth as suitable. The rubber pucks also move 8-10 inches fore-and-aft in their "trays."
Despite following their instructions to a geeky "T" and using the thread sealer, I have a leak at a fitting after 3 years of very modest use.
Without a load on it, it takes a good while to lower the last little bit. This could be user negligence, as you're supposed to put air pressure in the hydraulic cylinders for "something". I checked them when new, and that was that. However if it bleeds down over time, it's something else that needs maintenance, and the whole point of these things is to make life easier.
Finally, remember, it's sold as a jack, not a lift. Despite its mechanical locks, they don't recommend you go under your car without supplemental jackstands. Their vagueness in marketing borders on unethical.