Only if you're going to the airport:
Diamond is very reliable if you're going to the airport. If not, don't bother. The other night, we ordered a cab to go from one location to another within the District. 1 hour 20 minutes and four follow-up calls later, we still didn't have a cab. Instead of giving a reasonable response that would indicate we should try elsewhere, the operator continued to claim that someone was on the way. Basically, they'll only take large fares, not "small" ones. As a business traveler, I won't be using them for airport runs either.
by DC Christine on February 12, 2008