I am using it to move around my 3,500 boat+trailer. It is able to pull it up a 2% incline on a paver-stone driveway (slightly rough surface). Once it transitioned to smooth tile, still pulling up 2%, it lost some traction, so i had to assist it slightly. Once on level (maybe 1% up) smooth tile it works fine. I am powering it with a battery charger. I would give it 5 stars except that it twists somewhat alarmingly backwards and forwards within the mounting mechanism, but that doesn't seem to affect its operation. I wish the operator pole went straight forward; its clearly intended to fit on the starboard side of the trailer, but my spare tire is there. I was able to change the pole to swing out to the port side, but the control switch is then facing the ground. Not a big deal. Overall I am quite happy, it does the job at a good price.