They are certainly heavier, and depending on the design, the batteries can really shift the center of gravity up on the frame making them a little trickier to ride.

I've been looking at Prodeco for these bikes. They aren't the super high-end bikes you find in a lot of the bike shops, but they seem to be gaining a good reputation.

Their Outlaw is a Li-Ph 52v battery. Apparently this bike can get up to 30mph.

Anyone who is seriously considering purchasing one of these, I'd recommend they go down to their local bike shop and try one out. The amount of power they have is a little surprising.

What I like about them:

They are pretty eco friendly, at least compared to the small SUV that is my daily commuter

They sure make the hills a breeze, to the point you don't even need to pedal up them. The level of "assist" is adjustable.

Blasting by those guys in spandex is kinda fun...

What I don't like:

The batteries wear out. If the battery is proprietary, and it probably is, and the company goes out of business, as a lot of them will, your really stuck with a VERY heavy bike.

They are heavy.

They do take some maintenance, and you will need parts. Saving by purchasing online really not pay off in the long run when you don't have a local dealer to help you get parts/repairs.

In the long run, I think your money would be much better spend purchasing a really good pedal bike. Get one that fits you, it's not just about tire size. You'll have just as much fun, you'll get some great exercise, and probably make some awesome friends along the way.

I'm not affiliated with Prodeco in any way, btw - just trying to find ways to not pollute the world.