My wife and I stayed at Betsy's place while visiting Seattle. The guest suite was clean and comfortable, and Betsy left helpful notes in order to make everything as easy as possible. The location is in a nice, quiet neighborhood near the University of Washington that's 20-30 minutes away from downtown.
I would encourage visitors to check if their visit intersects with a University of Washington football game so they can set their plans accordingly - we arrived right before a football game and traffic was pretty bad. For guests visiting UW, I would strongly recommend this location. It's also a great place to stay for those spending a lot of time in downtown Seattle, but I would definitely caution travelers if they're staying during a football game so they can expect significant traffic.