Much as I like services like ZipCar and Car2Go they just don't make sense to me. Until recently I was renting from a suburban Enterprise Rent A Car and their daily rate was about the same as ZipCars. No annual fee. They come and pick you up and take you to the rental office (I usually rode there on my folder which I would throw in the trunk). The really big money saver was declining the optional (but recommended) insurance packages. It is hard ignoring all the dire warnings about running without 3rd party insurance but twice I have been involved in accidents with Enterprise Cars and both times since the accidents were not in any way shape or form, my fault. The other drivers insurance paid 100% of Enterprises claim. Since moving to the city I've been buying the insurance ($20/dy) and there is also a 20% tax on rental cars that doesn't apply in the burbs. This makes rental cars something I will only do if someone is sick (pets count) or dying. Car2Go and ZipCar don't fix that. I don't know about anyone else but an hours rental of a car for $10 just isn't practical. You eat half of that just in travel. Two hours, and you are hitting close to what Enterprise rents an economy sedan (off season) for an entire day! The pricing models for these short term rental services needs a lot of work. Cell phones and Dial-Up Internet services had to go through the same learning curve. I'm not sure what is taking so long though. ZipCar has been around for awhile but they are still hanging on the annual subscription, $10/hr. price point tooth and nail.
H