We enjoyed staying at Airi's place. Heaps of cafes and restaurants nearby. Also just within a few mins walk to higashi-shinjuku train station. Its very quiet at night tho.
The room is spectacularly clean. Loved it.
Airi is very responsive too. Check-in/check-out was smooth. If you have any questions bout the place, they will attend you almost immediately.
Thanks host. Would recommend this place to my friends/family if they're ever visiting Tokyo in the future!