I bought mine in June. I have a C-172N, and it's s slight uphill push to get it back into the hangar. My back told me it's time to get some help.
Customer service on the purchase was excellent. It arrived on schedule. It came almost completely assembled. Attaching the nosegear attachment fork and connecting the battery lead wire were easy enough.
It's simple, seems very rugged and well-built, and it handles the 172 very well, but there are some downsides ...
-- I wish there were a way to operate the nosegear attachment from the handle while standing up, the way the old Power-Tow was with my Bonanza years ago. Instead, I have to crouch down to turn the crank just a few inches ahead of the nose strut.
-- There is no way to modulate speed of the motor, it's either on full speed or off, like the old WW1 radial engines. To go slower, you just have to blip the switch on and off, which is easy enough once you get the hang of it. And if you're going full speed (which is only a very slow walk), the motor doesn't stop immediately; it "coasts" for a foot or two before it stops. You have to be careful in tight quarters. To stop quickly you might have to lift the drive wheels up off the ground.
-- It does not do sharp turns well. You just have to lift the drive wheels up off the ground to make a sharper turn.
Hope this helps. Feel free to PM if you have any other questions.