Mitsuko's place is good sized and clean. Although we only met and spoke for a couple of minutes, Mitsuko is a really nice & friendly lady, making sure that we were settled in without hassle.
The location is great, in approximately 10mins you will be able to get from Hatagaya Station to her venue at a standard walking pace. My favorite part is probably the many restaurant choices along the way from Hatagaya Station. Many of these restaurants open till late too, so if u end your day late, fret not about your dinner!
All in all, I would recommended this location for guests looking to stay away from right smack of the city center and get to experience a little more of Tokyo's residential neighborhood.
Oh and did I mention that there was a pet shop there too :)