Best place for bike maintenance?

Bike Station on Vanderbilt and Bergen or Dixon's on Union 6 & 7.

Bicycle Station on Vanderbilt indeed rocks: cheap, well-done repairs by competent, friendly staff. Dixon's on Union Street off 7th Avenue (across from the Tea Lounge, next to the infamous Park Slope Food Co-Op) does good work, too, but can get crowded, and, though mostly staffed with friendly people, has an older woman working there who obviously has had one too many stuck-up yuppie Park Slope stereotypes rub her the wrong way. I don't like 'tude when I didn't do anything to deserve it.

Stay away from R&S at all costs unless you're a rich bike snob, and based on my experience, the staff at On The Move (400 7th Ave.) aren't any better, just less attitudinal and more incompetent.

Mostly I do my repairs myself, so it has to be something beyond my ability or requiring esoteric parts for me to bring it to the shop, so note that my experiences aren't based on easy repairs.