I looked at the video and thought this solves the problem I have. Getting the boat in the garage at the lake around a 90 degree turn in the driveway, 1″ of clearance on each side requires pushing it in by hand. The incline right at the door makes that very difficult. I thought this looked like the perfect solution. That is until I read the reviews on eTrailer and Amazon. There are enough 1 star reviews and the 1 star reviews on eTrailer were validated by the president of trailervalet. It looks like they have a lot of work to do on quality.
Hopefully they will get past it, because once they do, I would be happy to buy one.
Also note, on their site they have a video on how to change the tires on the unit. That coupled with a couple reviews makes me think the tires are poor quality and need to be replaced.