Hint = Get a Chase Marriott Visa and you'll have preferrred status that gets you free internet at all Marriott branded hotels. The annual fee gets you a free night, so it's worth renewing (in my humble opinion).
This hotel is VERY busy (especially in the summertime) -- so expect the breakfast area to be congested. It's really a well organized machine, however, and if you are patient in the AM, you'll be rewarded with a fantastic breakfast as well as great service. Nice staff. Wonderfully clean rooms - quiet - A+++ on all counts.
We felt very safe wandering around in the evening. This used to be vacant lots, and it's been built up recently to be several very nice hotels right around the corner (Renaissance included, which offers a great bar with reasonably priced drinks.) Loved the free shuttle service to the airport (or nearby, your choice). We are always pleased with DC area Marriotts -- this new one is no exception.