Tianyu is very friendly and helpful. This harkens back to the old school days of Air BnB that is a little more like like couch surfing; you are very much in his home, no separate apartment. Expect some interaction with the host! He is very conscientious of letting the guest set the tone for how much interaction is wanted. We hung out and he showed us a little bit of the city.
One bathroom. Great location in Boston!