We had the pleasure of meeting Dimitris, Triantafyllos' son, who welcomed us into the property. He also gave us a few tips for the area and for our onward travel to the airport the next morning.
The apartment is in a great spot in a great part of the city - just far out enough to be quiet but close enough for access to all you need.
The apartment itself was super clean and we immediately felt very comfortable. We were only staying for one night but really enjoyed the 'vibe' of the apartment and would have enjoyed spending more time there. It really has all you need with aircon in the living room and a fan in the bedroom. The bed was incredibly comfortable. As noted by others, wifi signal is incredibly weak (not really effective in the living room but does work in other rooms) but this wasn't too much of a problem for us.
Perhaps in future we will be back to Thessaloniki in which case we will definitely try to stay here again.