Mary's apartment is a great choice! I have booked this for my parents' holiday in Thessaloniki and we were very happy with our decision.
It is a beautifully decorated and spacious apartment, with a very convenient location in the center of the city. As a plus, the apartment is located in a historic building so it really is an architectural gem.
The location is very practical, easy to reach, close to indoor parkings, shops and the main attractions of the city.
Communication with Mary was great, she is very responsive and pays attention to her guests. Check in and check out process is very easy and convenient.
I totally recommend booking this apartment!