Gary, for what it's worth, I've got the same lift as you're considering, on advice from Kendall (Nota4re), and I absolutely LOVE it. It's wide, and absolutely trouble free. I originally installed it myself, and didn't bolt it down. But if you're doing it yourself, be forwarned, the one ramp with the hydraulic ram in it is VERY heavy.
Anyway, the only comment I have, is that if it's not bolted down, it's not as "solid" as if it is (mine is now bolted down). I decided I wasn't really ever going to move it in the garage, so the castors were a waste. And if you're ever wrenching under the car, you'll be well pleased that it's fixed solid. It really does make a difference. Your price in the US is about $1000 better than ours in Canada.