After staying at 8 places in the past 3 months in DC area this is the best place by some margin. Location is perfect for evening entertainment with lots of good (but not crazily priced) food & drink options. The apartment itself is very comfortable and rooms are a good size. Merceded was very helpful with arrival instructions. A small but very valuable point is there is a key code lock (just type in a code to open the door). These are far superior to the very annnoying lock box which a lot seem to favour. I assume these are used to save money but key lockso much more convenient.
Recommend Capital Bikeshare as this makes everything easily accessible. No public transport apart from buses so this could be an issue if this is how you want to travel.