I was pleasantly surprised when I stayed at the Hampton late November for the Marathon. The room I had booked was located next to the elevator, so I asked for a change, which was accommodated. I likely should have kept the initial room; the elevators were quiet and I ended up in part of the hotel which looked older (though in good repair and clean) and a farther walk from the entrance.
The hotel is about 350 metres from the Marathon start, close to the Space Needle and Monorail. Rooms are spacious and staff was friendly and engaged, in spite of being a very busy weekend with many requests for "late checkout" due to the Marathon on Sunday.
Reasonable rates, attentive staff and free breakfast - would happily return!