I've gotten stuck in mid-town traffic, jammed in the tunnel, and circled the island repeatedly by a new shuttle driver who didn't speak English. While EWR to Manhatten is only 45 min plus depending on traffic, 4 hours is cutting it close to get from Man to EWR, especially if it is a 1/day flight. Too many variables.

But- I don't fly out of there every week, only 4-6 times a year. Maybe others are more comfortable.

I do, however, always fly CO out of EWR, as they have repeatedly assisted me in the above mentioned problems. And it seems like something always happens, regardless of cab, shuttle, friend. (haven't tried the helo) Never had to bribe. With my luck, I'd end up on "Cops" or something.