A very small and cozy place, but a perfect apartment for one or two people. I came in August when it was super humid and hot and the air conditioning worked well and the place was comfortable and clean. If you're just looking for a cheap place to sleep comfortably, this is a good spot.
Location is pretty good, close a subway line that can get to Shinjuku and elsewhere in Tokyo easily. Apartment itself is a bit hard to find the first time.
I met the host in person to receive directions on checking in and he was very nice and we even had a beer together. Check in process could have been a little improved but this is a minor complaint.
A great experience, and a friendly and responsive host.