I had been using this for about 3 months to move a 21 ft boat on a tandem axle trailer in and out of my garage. One day the wheel stopped turning. The motor ran but did not turn the wheel. I called customer service. The guy I talked with, listened to the problem, asked a few questions, said he would look into it and call me back. He did exactly what he said. Two days later a new unit was delivered to my door. As some of the other reviews state the attachment could be more rigid. However, to be fair the jack and wheel that came with the trailer are not as rigid as I would like either. I did use a shaped washer, a higher grade bolt and some anti seize lube for the bolt that attaches the unit to the bracket. In my opinion, the motor is very powerful and can overpower the attachment if you try to turn to fast, especially with a tandem trailer. Great customer service, good value and it works well for me.