The Pedego dealer in OKC lets you take an hour test drive, or you can rent one for longer. They have quite a few different models.
I've got the Element, I ride if off road sometimes and on paved trails. I love it.
Donner is right about battery problems, get a known well established brand, and don't try to hot rod it with a bigger motor and battery from China.
What is the range on a charge?