[xenon]

I test-drove a car with the parking assist and it IS very cool and would get a "wow" from passengers... I considered specifying it but then decided that a) I'd never use it as I rarely need to parallel park in the first place, b) I can parallel park quite happily should the need arise and c) amazing though it is, it isn't perfect.

I'd consider that if you get a car with it then great but I wouldn't move it up the priority list. The surround cameras are much more useful IMO.