Four of us (2 adults and 2 kids) visited Tokyo for 8 days at Jay's place and really enjoyed our stay.
The space is good, clean and ample enough (with the bonus of a good sized balcony). Communication was excellent since before we arrived and Jay helped us with several requests without hesitation.
The place could have had a bit more cooking / table ware, but I am sure that if you need something extra and ask for it you will get without problems. It was also a bit cold until we managed to get the right heater settings (an issue only in winter I would think).
The location was very good and practical for us as we had the JR train pass and it was an easy 10 minute walk to the nearest station, and we thought the Ikebukuro area of Tokyo was a very good place to be as first time visitors.
Would definitely stay again.