You can't beat this hotel for its location - right in Reston Town Center. Easily walkable to many great restaurants and amenities. Very close to the Transit Center, to get the 25-minute bus to West Falls Church Metro, from where it is a short distance to DC center. The shuttle from IAD was very convenient, and the service was excellent.
The rooms look strangely dated, however. Not a big deal, just a bit strange. Comfortable bed, but not outstanding sleep quality - could never get the temperature quite right.
Breakfast is a standard Hyatt affair: $21 for the decent buffet, and a good menu on top. If you want coffee + bagel, there's a Starbucks about 3 minutes' walk away.
What really offended me was the $10 or $15 for wifi. Hyatt must be one of the last remaining quality chains to be charging for wifi. Come on, people. I do prefer Hyatt over the regular competitors for a number of reasons, but this really lets things down. Most of your competitors give it for free now; even though my company's paying I still feel horribly cheated. Wake up! It costs you next to nothing.