Stay at the Westin Tysons Corner often for business. Like the location, as it's close to Tysons (free shuttle to/from hotel) but not so close that you get stuck in all the famous Tysons traffic. Older hotel (used to be a Doubletree), but they've renovated it pretty nicely. Can't beat the Heavenly Bed, but the food is pretty expensive and all the parking is outside (not fun during winter there). High speed internet is pretty bad (very slow speeds most of the time).