I've heard others also say that Bend Paks are wobbly and they dislike the air operated safety latches. My 4 post lift is a Super Lift brand made in MO. If I ever buy another one it will be a Back Yard Buddy or one made like a BYB, with the sliders on the outside of the posts. Some folks don't like BYB lifts because they won't pay the extortion fee to get the ALI stickers, but they are safe and sturdy lifts.