A major negative though is the escalators. Far to many of them are broken far too often. I find myself wondering if they were built by some corrupt contractor who bribed his/her way into the contract and then did a very, very bad job. They seem to take a long time to fix as well.
Another negative is the overall lack of coverage. If you live on the Metro, and are going to somewhere else on the metro, you are all set (duh, right?) But if you are going somewhere off the metro, it will be tough to train it alone.
The DC buses, unfortunately are not that great. Once you learn them, they can be managed, and the buses running at actual commuting times for a 9 to 5er, tend to show up approximately on time.
Trains 7 out of 10, points taken for escalator outages
Buses 6 out of ten, not frequent enough, not on time enough
Cleanliness/Art 8 out of 10 very clean, could use more art, one extra point given for plant life (!)
Usage 8 out of 10
Timeliness 7 out of ten. The Trains run on time (Mussolini would be proud) but the buses don't always.
Crown Jewel: Union Station +2
Total: 76% C+