Good service. I've used appointments, shortnotice and airport cabs. Drivers usually know their way around, I've never caught them intentionally taking the long way to run the meter.
They send an interactive text (or call you) on arrival. Some cabbies have been driving decades, lots of stories. One called himself a local historian on wheels. I found it interesting he said the checkers and name come from when there was one cab co. and it was a union.
Deffinately reccomend splitting a cab, especially at the airport. It really saves money.
Average fares; they take credit card. Also, cabbies like tips.
Clean cabs; the new priuses are quiet but not as roomy as vans or Crown vics. Splitting one is probably a bad idea unless by yourself.
What else is there.. They show up sooner than the competition, probably why I prefer them. Your milage may vary (ha). No Andy Kaufman sighting yet, I'll update if I spot him.