I have been using zip car for over 3 years in the yonge and eglinton area.
The good:
-it is more convenient than formal rental vehicles and it lets you use a vehicle for a few hours.
The bad:
-vehicle availability at yonge and eglinton has worsened significantly. In the past, there were ALWAYS cars available regardless of the day or hour. However, they have now reduced the number of vehicles in the area and I can NEVER find any cars.
Verdict - I am canceling my membership and relying on car2go as they at least have cars available all of the time.