We stayed for two weeks with one baby and one young child. It has good space and the location is great. Restaurants in immediate surrounds are particularly awesome. The place wasn't as cleaned as we would have liked and when the neighbour smokes, you can really smell it in the apartment (though it was tolerable as it was only about once a day). The kitchen wasn't that well equipped but I was able to cook basic meals and the host was very helpful and replies promptly to any questions. We had a great time in Tokyo.