Nice clean place. Suitable for 2 people, too small for more than that. Do note the apt is on the 2nd floor and there is no lift. Location wise not bad - It is about a 10min walk to the nearest metro station (shin-nakano), and then 3 stops to Shinjuku.
There are also lots of convenience stores nearby.
Ozat was quick to reply to any queries and even let us check in an hour earlier! He also had some snacks prepared for us, which was a lovely touch. Good stay overall.