The check in / checkout involves getting (or placing) the apartment key in a public park frequented by homeless folks. My guess is that this apartment isn't permitted to be an AirBnB, hence the sketchy check in. You definitely don't not want to do this after dark.
Other than that, it was a great place to stay. It was clean, a great place to stay, Ty was communicative and friendly. Once I was checked in, I loved it. The check in process is the only reason for the lower rating.