We stayed at this cozy nest in June 2014 for our first trip to Napa, and I must say that the experience was quite enjoyable. This location is only a quick drive to downtown Napa, and is close to various grocery stores, including a whole Foods Market! This was a life-saver for us, since my wife and I have very restrictive diets. The property is also conveniently located close to the Sliverado Trail by which several wineries can be accessed.
There's a queen sized bed and a day bed in case you have extra travelers or kids with you, and there's enough kitchen equipment to make small meals and breakfast. It's also pet friendly, in case you want to bring those.
The owner runs a tight ship, and maintains a very clean rental. She provided lots of reccommendations for wineries and restaurants in the area, and she's available to provide service, but will not invade your privacy. All told, I had quite a nice time visiting Napa and staying at this rental.