Good wi-fi. Good location in Ikebukuro, quiet area compared to other areas in Tokyo. Easy access to the train station so that you can get around Tokyo.
Perfect for 3-4 adults all though the 2 double-beds are in the same room. We were 3 adults (parents + 23 year old daugther).
Small kitchen but it worked, and we didn’t cook, just needed to make coffee in the morning :)