Infrequent visitor/rider of DC Metro but my general opinions:
- Trains/platforms are very clean
- Trains are somewhat unpleasant looking and starting to show age/wear similar to some train stations (inoperable escalators, elevators, etc.) however, very functional
- Customer service at stations is somewhat deplorable
- Must improve the entrance/exit farecard situation. It seems about a decade behind everything else in the world.
- In my limited experience quite a few slow downs/delays for no real reason. I understand it isn't a major subway system but reliability is a big deal when deciding between subway/cab.