My partner and I have used zip car for about 4 years. We don't use it that often but when we want to go on short trip or do shopping for big furniture. The only problem as said above is knowing the exact time you need the car for. You can extend your trip while out though which works great. If you want extra insurance, to completely remove the excess it is ?14.95 a month but you can add this on and off depending on when you're using it. If you do the maths, it's much cheaper than owning a car!