Great little appartement in Koenji. It is very small but I wouldn't expect bigger from Japan and for that price.
Everything we needed was there, though we haven't cooked any meal and I doubt it would be convinient for that.
Neighbourhood is a big plus. Keonji is a really nice neighbourhood with good coffee, restaurents and thrift shops. It is also super close and easy to reach Shinjiku and Shibuya with 1 dirrect subway line.