I have the Macwheel Wrangler 600 electric bike... it's awesome. It's a regular bike with the battery built into the frame and an electric motor on the rear wheel... I can tell it that I want pedal assist, or I can twist the grip and it will just go.
I used to think the same thing about electric bikes until I got one. Here's the thing, I'm old, fat, and out of shape... I can use that and if I need it, I can keep up with others or pass them and not think I'm going to die. You can set your level so if you just need a little bit of help going up a hill or to just go a little faster you can or if you just want to be completely lazy, set it to 0 and twist the throttle. Again with that instant torque, it is a ton of fun.
Here's a quick video on my bike... I did put handlebar extension to get it up a little higher and replace the seat but other than that, mine is completely stock and I love it.