TDD3500 Electric Trailer Dolly for 3,500 lbs Gross Weight or 350 lbs Tongue Weight with 1 ⅞” and 2” Hitch Balls

I bought this for probably the same reasons you are looking at this review; I need to move a trailer in a tight space and cannot do it with a vehicle and pushing it by hand was not an option.I have a tandem axle trailer with a 18 foot fiberglass boat, 350 Chevy engine, and assumed 3000 pound boat weight. The property does not make it easy to move with a vehicle and the tandem axle makes it impossible to turn sharp on concrete.First impression was the build quality. Very nice clean cut parts. It came with 2 small batteries which I was not expecting. Electrical connectors are meh. I applied electrical grease to connectors just because why not. While the threaded ball connector to trailer coupling is nice, there's a certain amount of play needed so both tires remain in ground contact. I was able to spin my tandem axle boat trailer 90 degrees on concrete dragging an axle "sideways" the whole time.First and only test so far was easily passed. It moves the trailer forward and back with absolute ease. I certainly recommend this!Two minor downsides though. First, I wish the handle was hinged so it could fold over and be more compact. I will probably do this some day, but it is not that cumbersome. Second, the forward reverse switch is mounted what I would call sideways. It makes sense to me that it should be flipped forward to go forward, backwards to go backwards. It is nicely mounted with arrows, so I cannot complain I guess, but flipping it left to go forward just seems less than ideal.That's my only gripe with it. The overall fit and finish mechanically is very sound, electrical harness seems a little janky but the thing works well and it will make my life much easier.

Muy bueno

Bought this item to move my trailer between two buildings. For the first 30 days worked great. No complaints at all. Then the trailer dolly started getting stuck in forward and would not go in reverse. Customer support with no help at all. Without being able to get replacement parts, it is essentially $1,000 paperweight

Awesome product. Works well. Only thing that could make it better is having a switch that can activate your trailer brakes if it starts moving too fast. It can get away from you if the ground is not perfectly level.

Just delivered. Looks to work great as I need BUT be forwarned about putting it together. First, one can do it, having two people makes a huge difference. However, this is a prime example why one should never use Chinese steel. The handle is impossible to put together as described. WIth the paint and extra steel (a seam perhaps) mine could not be put together without Demeling and sanding. What should have taken a short time took a long while of grinding. Nowtogether, if it poses any other issues or turns out to be exceptional I'll repost.After some use. These tires are great on hard surfaces. Get off into grass and loose gravel use a lot of caution. The slightest wet grass and you're stuck. The slightest loose gavel and you may be digging a hole. I had to travel from hard surface thru some mildly wet grass after the neighbor watered her yard, affecting my grass too. Be prepared to have someone pushing your boat while you use this to pull, just to get traction.Latest update. DO NOT buy this unless you are moving on pavement of solid ground. Even the slightest loose soil and you'll dig a hole. Even the least firm grass yard and you'll slip. Definately looking for some small snow type chains for these 10" wheels.

Not big enough for a double axle on the grass. Spins tires and tips over. Almost got hurt bad when 300 pound tongue weight flipped jack up toward trailer. Needs 3rd big wheel and bigger axles

Battery life is more than I expected.Thumb control for stop and go seems a little clumsy.

Excellent works great!!