Comfortable but lacks important facilities
I stayed here for a full month whilst doing academic research in DC. 
The upsides:
1. a mini kitchen means you can save muchos $$$ on food - DC restaurants are pretty expensive and not especially good value
2. the rooms are cleaned and serviced regularly
3. the location is good
4. the staff are friendly
The downsides:
1. noisy at weekends
2. the 'business' centre is way too small - just two slow computers, limited printing
3. At $12 per day the wifi charge is scandalous
3. no swimming pool
Overall it's a reasonable option, and being able to cook in your room is a real bonus feature that sets this hotel apart from others.