My husband and I had a great time in Mitsuko's apartment. It's small and cozy, but has everything you need, and Mitsuko was very friendly and helpful. She checked in once in a while to make sure things were going okay, and she even made cookies for us when we first arrived! The Hatagaya neighborhood has a lot of interesting shops and restaurants, and provides easy access to Shinjuku (and thus the rest of Tokyo). We stayed here while we looked for apartments nearby, but I think it would be a good spot for sightseeing as well.