Sato's flat is located extremely close to Ikebukuro station - less than 5 minutes walk to the Tokyo metro lines and another 2-3 minutes to the JR station. From the JR stations it's all flat ground with escalators allowing for easy luggage carrying (which was very much needed at this part of the trip). The flat is located above ground level, but there's a lift / elevator to the flat!
The flat itself is as described in the photos and descriptions. The host has graciously provided many extra materials to help people pack including large scotch tapes! The beds are comfortable.
The area do have some noise in the evening, especially as people leave clubs, or sirens, etc. However, we were able to sleep without being distrubed too much.
Ikebukuro is an excellent place to stay with many great restaurants, night-life, Karaoke places, and other fun activities! Ikebukuro has many transport links including the Narita Express which made our journey home easy.
I would recommend Sato's place for a stay in Tokyo.