I spent one night here on a brief business trip. It is very well placed for museums on the mall, the Capitol, and numerous nearby institutions. The rooms are spacious and mostly nicely decorated - although there was an attempt to be a little too clever, and our room had one of the worst pieces of hotel art I have ever seen. I can't comment on the price/value since my room was billed to and paid by (indirectly) the government although my general experience in DC is that prices vary enormously depending on business demand, so if you are a tourist, find times that are not popular business trip times - like weeks with national holidays. The garage is expensive at $48/night (it was $39/night at the Embassy Suites at 10th and NY Ave a few weeks earlier) so if you are a tourist with a car you may be better off staying a little further out and using the excellent metro system.
Although the web site does not indicate it, there is a respectable fitness room open 24 hours. Unfortunately the outdoor pool - that is far better than most hotel pools for lap swimming - doesn't open until 10am so it can't be used for early morning exercise.
The restaurant looked interesting - but a little pricey. I didn't use it because we like to sample DC's many ethnic restaurants for dinner when we are there and breakfast was provided by my meeting.
hotel reviews