The reverse is really neat. I got to road test one & when you're moving you can slow down by twisting the throttle backwards.
That should really save on break pads. When you are stopped it works as a reverse gear.
My problems with it are the origanal cost, the cost when you will need to replace the batteries & the limited number of places to get it worked on.
I have an electric bicycle & I am already well aware of those problems.
It just occured to me that if your ride to work is only five miles that an electric bicycle might just be perfect. (I could make you a very good deal on one.)