If you like cabs that unapologetically show up 30-45 minutes late to take you to the airport, cabs that are driven by some creepy 64 year old dude who likes to talk about the stripper "wh0re" he picked up and how she wanted him blah blah blah..., cabs that may smell like a hobo who shat himself (before dying 13 days ago in a dumpster) (in the summer), cabs that start the meter at $7 in Old Town because the driver thinks you're drunk and he can get away with it, then you've found a winner--Discount Cabs!
5 out of 7 times we've used them, DC has been phenomenally unprofessional and awful.