In a nutshell: Awesome! I can recommend it without any doubts.
This is what every AirBnb experience should be like.

*The sharehouse:
Great location, 2-3 min walk from Higashi shinjuku metro station which is beside a nice coffee shop to get your morning started. There are several 24/7 stores on the same street. I rented a private room with a balcony on the 10th floor, the room was clean and Min made sure I had everything I needed. There is also a very nice common area, with a kitchen, tv, table, balcony - a pleasant place to hang out and meet other guests.

*The host:
In my opinion the best part of this experience. Min is the perfect Airbnb host you could only imagine. He really looks after his guests, and he's simply a really cool guy.

A couple of examples from my stay:

-First of all, my flight was delayed. Min waited for me at the sharehouse till 01:00 at night and greeted me with a smile and explained everything I needed to know.

-When Tokyo unexpectedly got cold in the beginning of April, Min came in and gave everybody remote controls for personolized heaters, just in case we are cold.

-I didn't expect bad weather so I didn't have any warm jacket with me. When I got really cold during a walk, I came back to the house and asked Min what is a good place to buy a jacket. What did Min do? His first response was - "Take my jacket". Yes, he lent me his own jacket, although he didn't have another one for himself!

-The last day he invited me to lunch and we had a good talk and laugh.

To summarize - It was the perfect choice to book this guesthouse. If I'm in Tokyo again, this is where I'm staying.