I spent a total of 9 nights and 5 adults total.
1) Owner fast response to any queries.
2) Location is very convenient, Ikebukuro Station! One of Tokyo's largest shopping areas and transport hubs. Less than 200 meters to the C6 exit, and 300 meters to Ikebukuro Eki Nishiguchi (station's west exit bus stops) with a direct bus to/from Narita Airport via the Willer Express website.
3) Although we didn't cook, it's good to see the cooking wares provided. We use both the electric water boiler and portable cooking stove to boil water. There is no corkscrew provided (to open wine bottles).
4) Value for money, the apartment is compact and functional as a getaway home.
5) However not recommended for adult groups larger than 4 adults, I feel that 4 adults and 2 children are the maxima for an apartment with this size and offering. This a reminder that it only has 1 toilet and 1 shower room.