Three and a half stars...Great location
This is an older, well located hotel, blocks to the White House and the Metro.
We stayed at a Marriott last time we were here that was newer, about the same cost, but not as close to the White House. Four stars seems a bit high. The public areas are clean and comfortable but modest, and there's no pool. The staff were very friendly and effective. 
I used Priceline, and at $200/night, it's reasonable value.