The apartment is smaller and darker than what is shown on the pictures and could use a little freshening. It is good for 2 to 3 people but definitely not for 6 as advertised. There is no space to store your belongings and bags as the cupboards are used to store extra laundry, futons and mattresses.
That said it is still a good apartment but the price should be adjusted down.
Location wise it is GREAT, the building is clean and the apartment is very quiet. Sangen-jaya is definitely a great area to be living in with plenty of shops, bars and restaurants around while being 2 subway stops or a 35 minutes walk away from Shibuya. Rintaro is a great host and communication is smooth and easy.
We stayed twice in his Roppongi apartment before so were expecting something as nice hence our little disappointment. But Sangen-jaya is much better than Roppongi as a neighbourhood to live in.