Great stay. Rating 5+.
First about the home: We stayed here for about 5 days in early summer with two families, one with small kids (1.5 and 3) and one with larger kids, and a dog. It is a beautiful home, well decorated with a great kitchen and master bedroom. While there are three levels, but it is good for young kids as they have child gates and a very nice jogging stroller to use. It also has a nice backyard for a dog or for the kids to run around (although you also need to use a child gate out there too to avoid a stairway).
Location-wise, you are in Seattle but it felt like a friendly neighborhood suburb w/parks nearby (including all the trails of Discovery park), and great running (either along Magnolia blvd or Discovery Park or the Ballard Locks).
The biggest downside is that it is about 5 miles from downtown so it is better for families/kids than people just wanting to tour downtown Seattle.
I give it a 5+ stars because of the service. When we got there we noticed the child gates were broken and there was no jogging stroller. The manager apologized and the next morning came with new child gates (he asked how many we needed beforehand) and wheels pumped, fairly new Bob jogging stroller (they actually had both the normal and IronMan bobs). Really great response, IMHO.
Would stay here again!