My wife and I stayed at Derek's house with our 2 year old son, and everyone was comfortable. The house is conveniently located in a safe, upscale neighborhood with plenty of options nearby for food, as well as a subway station nearby. Roppongi and Ebisu were 1 stop away, and Shibuya, Shinjuku, and anything else on the Yamanote line was pretty easy to get to. The house is modestly sized by Western standards, but makes a good use of its space to create multiple private spaces, which allowed us to move around while our son slept. Derek also provided us with a crib, which meant he slept in a familiar bed! I'd highly recommend staying at this property if you have a family.