We were a group of 6 and we had ample space for everyone in Kaoru's place. Everything, from furniture to the other things, were of good quality.
The area where it is in though is not a lively area and the train station is roughly a 10-15 mins walk for us. It really is a residential place but it is a very good place as a base for your stay. There was a playground nearby so that was a plus for the kid we have with us.
With all of this, I would stay at Kaoru's place again, if given the chance.