Sei's place was a wonderful space, clean, tidy with lots of useful information for the local area. The host was fairly hands off, allowing self check in, but was available for contact if we needed them. Perfect for myself when I was feeling quite socially anxious when first arriving in Japan. Sei was also incredibly forgiving when we accidentally broke one of the ladder steps.
It is a bit of a small place, the three of us were occasionally crawling over each other, the space is used as effectively as possible. If you're going in a group of three or four to this place, I'd recommend that you are mostly nimble, have backpacking experience or at least be very good friends.
The location is excellent, a minutes walk to the nearest shop, several minutes to the nearest shopping complex, barely 10 minutes to the nearest station and the rest of Tokyo.
Anyway, we had an excellent stay at Sei's place. Served our needs perfectly and we left it a little sad, but very happy. Thanks again!