I manage two bars and use these guys when my customers ask me to call them a cab. The reason I use these guys over other services in the city is that I feel safe putting my customers in their cars and they are willing to accomidate the occassional drunk or ???. (plus their prices are so reasonable!!!!)
They usually are able to pick up pretty quick but you can always call ahead. I've never had a problem getting a ride several times in a night.
Even last night, thank you for getting ME home safely.