I stayed at Stathis his appartement for a week. I really enjoyed my stay there, it's close to the city center and was just the right size for me. I did only spoke to Stathis over the phone, cause he was in Athens for work. But a friend of him was waiting for me when i arrived, to show me the place and hand over the keys. Both are really friendly and flexible, I would definitely stay there again if I visit Thessaloniki!