For $600 I bought a dual motor 1500w ebike that can haul my overweight self up a steep incline without pedalling. It tops out at 35mph. As long as I pedal along with it and stay at a sane speed I can ride 40-60 miles on a charge and still have enough juice for the last push uphill home.
It's not really an ebike, it's an e-moped at worst, and I'm glad that my locality doesn't have strong laws about it because it's fun, but I could also see how dangerous it could be in the hands of an amateur or thrill seeking rider.