If you're putting safety at the top of the list, I would go with the Backyard Buddy. A little more expensive, but if you look at the design, you'll see what I mean. All lifts, where the bed rides up in channels in the legs are prone to kickout if not stable or level. They are made to be bolted to the floor, even though you can get wheel kits for them. The BB lift overcomes this by having solid sleeves that completely surround the legs, making it virtually impossible for the legs to kick out. I've looked at a lot of 4-post lifts, and when I get one, the Backyard Buddy is the one I'm going to get. Your car, and your life are worth the extra money.