The good news is, the Transit Authority is building a Metro stop about a block away from this hotel. The bad news is that it is not built yet so you feel like you are in the middle of nowhere, which, in my opinion, you are. Driving around at night, the streets are not well marked at all. One wonders if Virginia DOT is too busy to put reflective signs up at all, (this far from the Downtown-Mall area) and since public lighting is few and far between, I would not recommend trying to find this place at night. Also, if you miss the turn from the highway, you might end up on the Toll Road, which will cost you $4 (and credit card ONLY) plus several miles of driving in darkness until you can turn yourself around in the right direction to take another shot at it.
None of this is the hotel's fault, but good to know if you are driving through. The hotel is very comfortable and clean. Rooms were in great shape and staff was courteous. We opted for a two double bed room on the fifth floor; no issues with sound from nearby Dulles. We saw the inside of the junior suite and I don't think I have seen a hotel room that was so tiny and tight. Definitely not a luxurious upgrade -- opt for two doubles if you have the choice.
We have stayed at Sterling or Asburn hotels for several Thanksgiving visits to family now, and have taken the kids into town several different ways. I've also been to DC enough times on business to recommend that if you are staying this far out from the Capitol, and you still want to take the kids in to sightsee, (and avoid the hassle of parking and crazy traffic) I would ask the desk to recommend a decent car service to pick you up by 9 am. It's a bit pricey (around $60?) one way, but I found by the time we drove from hotel to metro station, paid to park, bought tickets, and took the metro in, we lost a significant amount of daytime to tour. Plus it was a hike to whatever monument we wished to see. (And four people traveling by metro cost us about $40 when all costs were rolled in.) The best part was --our driver dropped us right in front of the museum we wanted to see and offered to pick us up at the end of the day (which he did.) That experience made the day downtown much more enjoyable for all of us.
The hotel has a restaurant, which we only used for breakfast (which was not free). I suspect in a few years that area will be hoppin' with more competition for your breakfast dollar, so it would be great if breakfast was free. All in all a decent place.