I have one.
The company sucks. They didn't send it out next day, like promised, but about a week later. That happened to be the last week of decent weather. I had roughly 3 days of above 0 temps to test it out. I spent them buying new pedals because it was missing one, and then fixing the chains, they kept falling off. About the time I got it ride-worthy, bitter bitter cold set in. Oh, and the part where it folds in the middle was bent when it arrived, I had to unbend it with a crow bar before I could even straighted out the bike. It's still been cold, so it's been garaged all but one fluke 50 degree day in January. I still can't get it unfolded, but haven't tried too hard. I rode it that day in january, it's kinda fun. Low speed, but I knew that. Pedaling with the motor doesn't help it go faster, the engine just stops if you go fast enough.
I haven't had any problems with the battery. When I charge it, the light stays red for a little while, then turns green. But I haven't tested the range.
Oh, and if you bungee a dog crate to the back, your dachshund doesn't speak to you for a few days
.