Excellent location
The location is great with only a few minute's walk to the Air & Space Museum along with the Mall. On the weekends there aren't many amenities close to the hotel since many businesses are closed, but we found a few sandwich shops nearby that was suitable for lunch. 
The staff was friendly and although breakfast was busy, they offered a different mix of items on the 2 mornings we were there. The staff was friendly and bused the tables which is not common at the Residence Inns. 
We used the pool/spa and exercise facilities which were all well maintained. The room with the pool could have been a bit warmer since the pool is not heated.