I picked it up Saturday morning and used it yesterday. It has slots for a forklift on the bottom so I used my clamp on forks to put a little down pressure on it. Between that and the outriggers, the base was rock solid. The aluminum boom has some flex in it, so it's a little unnerving (and more so the higher you go) but after getting used to it, it went well. I'm going to see if I can find a place that services them. I think it needs some routine maintenance, lube and adjustments, to be perfect. It came with operation and maintenance manuals, but they aren't user friendly.Don't know. Physics says the scissor jack one looks more stable to me.
I would be super careful leaning while up in this.
It weighs around 700lbs and my loader can only lift it a half a foot off the ground so I think I'm going to get these 3-point adjustable forks from Tractor Supply: Adjustable forks Those are the only 3 point forks I could find that look like they would adjust narrow enough to fit. That should make moving it around on grass easier. It rolls great on the driveway though.