I stayed at Antonis' place for 9 nights and it was great! The flat is super central, right next to many attractions in Thessaloniki and less than ten minutes walking distance from the seafront and the white tower. It is also in a great location to explore the old part of town up the hill!
Antonis was great at communication, very quick and helpful in his replies. Check in and check out were easy.
The flat is as described and is equipped with pretty much everything you may need during your stay. Would definitely recommend staying here if you want to explore Thessaloniki!