tl;dr - Book this place! Mitue went above and beyond the duties of host. This was our home-away-from-home and my only regret was that I didn't stay here longer.
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Location: FIVE STAR. Fantastic. On Google Maps you're only about 256ft away from the train station but Mitue provides pictures along with directions to get you straight to her place. It's impossible to get lost. While you're about 30min train ride away from some of the more popular Tokyo destinations, you get to experience more of what it's like being a "local" by staying in the Kameari neighborhood. For me that's a plus.
Communication: FIVE STAR. Mitue was incredibly fast responding to our questions. This was the last place I stayed at while in Tokyo and I had an evening flight back to the US. When I asked if I could do a late checkout, she had zero problems with it and even said we could take our time. This saved us from having to pay $30USD to leave our luggage at a station locker. She also claimed that it might be noisy on our street because it's so close to restaurants - Yes, you might hear people on the street but it's far from noisy. (Any busy US city has much more noise than that).
Accommodations: FIVE STAR. This is where Mitue and her place really shines. This was one of the largest stays I had in Japan. The beds were very comfy. The bathroom had a shower curtain (uncommon for most AirBnBs in Japan). The kitchen had all the basic staples you need if you wanted to cook (cooking utensils, seasoning, etc.) - and trust me, you'll want to cook if you ever get tired of eating out every day. Her bathroom had everything from hair masks to those spa treatment masks if you want to de-puff your eyes. She left us fresh bread and candy on the table when we arrived in case we got hungry. She gave us a gift when we checked out. I've stayed at hotels where accommodations weren't this nice.
Thank you, Mitue, for the most wonderful stay!