I have the 5000XL and use it (with rubber blocks) on a lowered '82 SC with aggressive wheel/tire set up. This decreases the amount of space available to allow for the radial movement as the lift rises. I get tire interference if I use the "usual" fore and aft lift points. So, I pick up the car using seam welds slightly more inboard alleviating the interference.
I've really like having it. Oil draining, CV joint replacement, muffler replacement, heater back date, are some projects that come to mind.
I keep them on the ground and pushed together for storage. I keep a car parked over them at all times so I'm not "losing" foot print.
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