I'll put this bluntly: if you are planning a trip to Tokyo, you need to stay with Koji, Nami, and Mr. T.
It doesn't need to be Pine House. They have multiple apartments in Tateishi at a variety of price points, and their higher priced suites are worth the upgrade. Regardless, you owe it to yourself to stay with them.
Koji, Nami, and Mr. T are gracious and responsible hosts. Their accommodations are very clean and well maintained, and every detail is accounted for. They are easy to reach and very good at maintaining communication. They do your laundry. They give fresh towels. Heck, they're happy to take you out on the town if you're so inclined. It was like I landed in Tokyo and immediately had friends.
The location too is nothing short of ideal. Tateishi, in my opinion, is the optimal way to experience Tokyo as a tourist. It is a quiet, residential neighbourhood right next to a local train station, with a grocery store, authentic open air market, stand up sushi restaurants, tiny bars, a drug store, a coffee shop--everything you'd need for an extended stay, all nearby. The proximity to the train station means you're only a quick ride and a transfer from the crush of people in exciting places like Shinjuku, Shibuya, and Asakusa. And after a busy day of sightseeing or nightlife, it is nice to come home to the peace of Tateishi.
To repeat another reviewer: My only complaint is that I didn't stay with them my whole time in Tokyo.