But it only works when there is enough space and isn't suitable for parallel-parked cars. It's great in theory but in practice it won't be so quick and easy.
The solution narf posted above may take a minute or two longer but you can also get vehicles out of tight spaces that way.
Good luck getting a full size truck or SUV on that crane. Even my midsize XTerra with a few mods is over 5,000#.