I'm in this area once or twice a month for my wife's work, and until recently I simply found something to do (usually nothing) while she worked. Only in the last month have I been turning on the app and doing deliveries; it is quite busy.
I work in Charlottesville, Virginia normally and yes the app works anywhere in Virginia, DC, and Maryland.
Maryland is awesome, Northern Virginia and DC are also busy but often unpleasant because of traffic, the big office/apartment buildings and parking problems.
Does anyone else do this in these different locations?