Joea,
Nothing much, just to change the
oil, work underneath (wide open vs. 90% obscured due to the nature of the beast. (Scissor Jack)
Mine came with an extrememly heavy center tray, (slides from front to back), if we have to change a tire, rear ends, what ever, we just slide a OEM GM, Ford, etc., scissor jack in the tray and simply jack up either end to get it off the rails. It's aldso great to just raise the car up to working height too, but there is a down side to everything, on occasion the posts get in the way, but not often.
Another big plus is, you can stick your car, ATV, Motorcyle, 'junk' on the lift, raise it up and then park another car under it.
Mine also came with huge casters that slip on in a second! I can move the entire lift around the shop WITH a BB 502, tilt nosed '40 Willy's on it! Truth in advertising

It sure steers a heck of a lot easier if you've got some help! My floor has a very slight slope in it for drainage, I get that puppy moving with a car on it and it heads for the drain everytime!
Paid 2K for mine too, included shipping, the removeable casters, the large center tray and about six plastic drip trays, along with removable ramps that handle the Cobra with ease.
One of my co-harts wired up a string of lights under his rails. Talk about light! Gonna do that to mine as soon as I get the time. The only other thing I have done to it, is take a 'punch-out' out of the electrical box for the pump and added and outlet to it so I now have juice right on the lift.
Yep-gave my Snap-On Scissor Jack back to the Snappy dealer...no regrets.
Ed 'DV' Combs