The location is really close to Ikebukuro station (about 5 min walk), there are a lot going on, both JR and Metro are there, but JR is more convenient if going to Shinjuku.
The host provided all the necessities you need (even a pocket WiFi). There's only 1 stove, but we never even used it since we always eat out, and used microwave to heat up food. The shower was great, strong water pressure and good temperature control, just no where to put your clothes though. Myonje always responded efficiently.
We checked out a few minutes after 11am, so we got to meet the cleaning lady, she was really nice, it was a rainy day, she even provided us umbrellas.
Overall, it was a great place to stay, the only thing was we noticed the area behind the bed stands was very dirty, maybe they can clean that area sometimes. But there was also a vacuum in the room, so we did some vacuuming ourselves. I highly recommend her place!