Pros
Under strong leadership/management, you can receive great exposure to other disciplines (Sales, Marketing, Ops, and Customer Service) that you would not get at a larger company. You will learn new skills as most positions require a fair amount of entrepreneurship given the aggressive goals, lack of resources/support, and high expectations.
Cons
The internal culture isn't what was advertised. It was't fun and offer no equity to make up for the notoriously low pay and long hours. Staff turnover is extremely high for a growing company (read into that however you like). As such, quality training is basically nonexistent and given how relatively new the car share industry is you will likely have a lot to learn and very little time to prove yourself. No HR staff existed in local office. Internal practices displayed very little regard for transparent process or employees at times. Have a look at various other reviews from major cities all over North America, the trends speak for themselves.