Chris' place is located around 15 minutes from the 'real' center (Scott monument). There are bars and restaurants around and the botanic gardens are close. Plenty of public transport and Ubers too.
The apartment is very charming and clean, and Chris is really hospitable. He sent us directions to his place right after booking, a later check in was not a problem, and there were even some drinks as well as some sheets with info about the city as well as the apartment in the room. There is a cosy living room that is shared with others guests as well as a small but clean bathroom and a kitchen, where breakfast is served.
I would definitely recommend Chris and would stay there again should I return to Edinburgh.