Stayed one night while parked vehicle for 2 weeks at the Sleep Inn. Rooms were adequate and functional. Free WiFi and breakfast was appreciated. The hotel is located in a more out of the way area, but there is a IHOP next to the hotel. Due to the proximity to the airport, there was regular noise from planes. There is underground and outdoor parking, the underground was full and we parked in the outdoor lot which was a little muddy. I asked the Shuttle Driver about lot security as my vehicle was located in the far corner of the lot and close to the street without a fence, and he indicated that the lot is secure. If parking, I would suggest asking for a spot underground or closer to the hotel entrance. Otherwise, a solid place for an overnight stay prior to flying out of Seatac.