Great service to have especially when I was still an university student and I was under 25 years old...mainly cause the insurance is covered and you don't get robbed by the under 25 insurance grab that other car rental places enforce on young drivers. It's great for those who just need it for a quick rental, but for longer rentals, if you're able to rent from other car rental businesses (i.e. hertz, budget, etc..), that would probably be a cheaper option.
Rental cars are in good numbers around the downtown core and other university campuses to make them accessible. You can rent them on the whim as well as online or through your smartphone if you have one. Word of warning though, if you're planning to book it on a long weekend, better book it a week in advance. Otherwise, you're going to be stuck with a crappy vehicle that's not near.
Oh! and if you're ever moving, they also have Zip Cargo Vans to transport furniture and what not when you're on the move.