Much like other reviewers, there are things I love and hate about car2go.
For short trips with another person it can be cheaper than the TTC and it's a good choice for a destination where parking would otherwise be expensive.
It gets expensive if your trip is slowed down, and this is particularly annoying when you are slowed down because of the service itself. For example, having to pay per minute to talk to customer service, to sort out problems with getting gas, looking for parking, or while waiting for your account to be verified.
Also, the cars themselves are just not very good and you get a bit of a jolt every time it changes gears.