I got a slightly used one recently and it came with a couple of tall jack stands that I put under the "outboard" arms and it is good and stable. Stands go under the arms so that there is no lifting of the vehicle off the arms! I use low jackstands for brake jobs. Have lifted my 5400 lb tahoe on this 6k lift. As other's have said, I do not use this 6KLP without stands as I do not like jacked up work moving at all. It is perfect for my shop where I want floor space flexibility and can't afford to tie up a big chunk of floor space with a hoist. I also screw out the extensions on the outboard side a little higher than the inboard side to counter the bending moment on heavier vehicles. The arms still bend under the load but that keeps the vehicle more level. More importantly, it is perfect to move between a couple of non-running project vehicles. Moves around the shop way quicker and easier than I expected. Just like a pallet jack. Photo is from reconnecting the exhaust pipe to header after a head gasket job on my son's Isuzu PUP. Just took a couple of minutes to slip the unit away from one vehicle and under this vehicle for a couple of minutes of "hoist time" on this project that was otherwise done sitting on it's tires. Would have been a PITA to have to push one job (the 'Bishsi Monterror that you can see behind the PUP) off a stationary hoist and the PUP on for this quick job. Everything has it's pros and cons. I originally was mostly concerned about the amount of underbody the arms cover. So far it has not been a problem, even on a 4Runner exhaust job. I agree with Wrench97's post, I would not be excited about dropping an engine cradle on this hoist. Again, Pros and Cons abound. I am interested in other experiences people have had.