I think they are kind of a scam at the present time. Some of it depends on how you drive... the infrastructure just isn't there to support driving long distances and the batteries just don't last enough miles. If they ever standardize battery charging connections (I think that is happening to a certain extent) so they can be charged at any charging station then they will make more sense. I think in a few years battery technology will have evolved enough to go a lot of miles and then they'll make a lot more sense.