My wife and I needed a place to stay near the Santiago airport, and we decided to stay with Willy and Olguita after reading good reviews here. We were not let down and had a wonderful stay!
For an extra (but reasonable) fee, Willy is happy to coordinate airport pickup and drop off, which is great, as Santiago does not have a metro stop at the airport, and as the many taxi services are overwhelming and likely to overcharge you.
Once we arrived at Willy's house in Pudahuel (which is between the airport and Santiago), Olguita greeted us with juice and cookies and made us feel even more welcome. She even told us a good walking route around the neighborhood later that afternoon, as well as some places we could eat.
The next morning was an early one, as we needed to leave by 5:15 to catch our flight, but Willy was up at 4:30, making us breakfast before he drove us back to the airport. All in all, everything was great, and Willy and Olguita are very welcoming and friendly people.
Other info:
Willy doesn't really speak English, but Olguita knows enough to communicate. Fortunately, my wife and I speak Spanish, but I could see how interactions might not be quite as easy if you don't speak
Spanish.
Also, from a little display case in the kitchen, Willy sells phone cards w/ data, etc. So if you need one, you can buy one here.