We have been there for 2 weeks and enjoyed every day! After a long day it felt like coming home thanks to the warm atmosphere in the apartment.
Martin was a fantastic host, friendly and pleasant (and his dog Alfi was lovely :)
Room, bed and bathroom were comfortable and very clean.
Metro, bars & restaurants (Martin gave us great tips!) and the city centre are very close but it is not loudly in the apartment. I really recommend this fantastic apartment!