Gerwin's apartment was as described/pictured. As many reviewers noted, it is small: 90% of the bedroom space is occupied by the bed. I rated check-in and communication 1 star.
Check-in: Check-in requires a meet-up with Gerwin's "associate" upon arrival to the city. Because we landed during rush hour, both of us were way off on our estimations of when we'd arrive in the area. Essentially, my family and I had to wait at a nearby cafe for ~ hour to be let in. A lockbox would be an easy fix for this.
Communication: Gerwin was very responsive and when we notified him of some issues in the apartment, he answered quickly and coordinated to have someone come fix it. However, the dishwasher was broken and needed maintenance from the building super. The super entered the apartment one day without notice or permission. I told Gerwin that I felt this to be unsafe and invasive and he apologized.
Overall, Gerwin's apartment is good value for the # bedrooms and the location. Assuming he does not allow a stranger into the apartment again without permission of the guests, I would recommend his space.