I've had a Bakcou Mule for about three weeks. I have less than 10 miles on it so far. It does exactly what I needed. I can leave my house through the yard, up a very steep gravel incline, over rolling pasture to my farm. Then I have a very steep hill to ascend. I could not ride my traditional mountain bike up those hills. The Mule does it easy. I always ride with pedal assist.
The only downside is my stature. I'm only 5'6" and the stand-over height is 29". I can mount the bike fine, left pedal start and then swing the right leg over. Getting off is trickier. I should have waited for the step-through 24" model.
I thought I might use the bike to ride to some of my stands pre-dawn but I have to get dismounting down better. I do use it to scout and pull camera cards. More exercise (which is good) than I thought it would be.
I'm 66".