Azabu is a cozy little house tucked back off the main Hiro-o shopping/eating street. It can't be beat as far as location - literally no more than 5 minutes to excellent groceries, great coffee and restaurants, and the subway.
There's everything in the house you need if you want to cook at home (we are family of four on a long Tokyo stay so we ate quite a lot at home) and this is great. Also there's a nice Japanese style bath and the kids loved sleeping in the attic space.
Communication was quick and easy and the host really accommodated our requests. Highly recommend this host.