Zipcar App
I love Zipcar, because I spend about as much on it a year as I used to spend on parking tickets alone in SF. The app can be a handy extension to the Zipcar service, but it has some definite quirks too.
First of all the magical-car-management-satellite-in-the-sky is slow. Very slow. Without a good shot at the sky, punishingly slow. If you're counting on using the app to get into the car, you'd better bust out your card instead. It's a neat idea, but it just doesn't work that well in practice.
The second thing is more of an iPhone in San Francisco problem - the app's error handing on network hiccups is pretty iffy. And AT&T in SF is nothing but network hiccups occasionally punctuated by service. A few days ago, I was needing a car real fast. I was, quite literally, standing there looking at the car. I saw there was not a reservation on the car in the app. I tried to begin booking. AT&T went south. I fought. I wailed. I gnashed my teeth. And then the person who succeeded in reserving the car from home walked up a minute later and drove away. And I got to take cabs the rest of the day.
Was that the app's fault? Not really, but at some point it wouldn't hurt to add error checking that says, "Hey, it looks like you're trying to spend money with us, but you're having a problem. Touch here and we'll connect you with an operator to complete your order."
The same is true of the find-a-car map. It would be great if it would take the times you want a car for and zoom out till it found the closest available car. I don't really care that every car in this lot is booked in the next hour. Maps that mock me and put little grey pushpins in that tell me, "You're in a wasteland of no mobility. Throw yourself onto Muni tracks and hope one of those shows up," aren't as helpful as getting the info I do need.
Would I recommend the app? Sure. It's your only choice. It's better than trying to use the Zipcar site on the iPhone browser. But it could be better. It's not in a state where you can count on it in a pinch.