It wasnt me. My only experience with one was with a used one and it didnt have enough power to lift a trainer off of the ground. I put a LA .40 in there and it pulled the trainer around fine. I called Horizon and they said, and I quote "Oh, you got one of those". They sent another one and its fine and dandy (we use it in our club trainer). If you purchase one I would do so from horizon b/c obviously from their remarks they had some bad ones in the bunch.