We stayed at Gary's place for a week this summer and it was adequate for what we wanted from a studio apartment in Brooklyn - the bed was comfortable, the space was big enough for two people, its location is nearby subway stations for easy access and local shops, bars and restaurants. Getting into Manhattan and around Brooklyn was easy. Gary was also extremely helpful and a very good communicator being and during our stay.
There was also a few things that caught us a little by surprise though - the studio is on the ground floor of the building and next to the communal front door. You can hear other residents as they enter and exit, as well as any street noise from outside. It is a quiet street at night though so we didn't have any issues sleeping. We also expected the studio to be cleaner than it was - there was some dust around the place. The kitchen could also be better equipped.
Overall our stay was fine and passed with no problems but I'm not sure we'd stay again.