First of all, location is very strategic. The neighborhood has a lot of stores and restaurants and is sufficient if you want to hang out within the area. It is also only two stations away from Shinjuku and around 20 minutes from Shibuya Station.
The place is also very clean and well organized. Space is good for two persons and facilities are complete.
Mitsuko is very accommodating and answers our questions and very hands-on.
There's pocket wifi too and you can bring it around town. Battery life will last about half a day so bring your powerbank.