Olga's studio flat was really cosy and very comfortable. It has all the amenities you may expect in a kitchen or bathroom and it was very clean.
Olga was in touch before we arrive so we don't have to wait checking in.
We recommend this place.
It is central with lots of restaurant options nearby.
Thessaloniki is a busy city so don't expect secluded or super quiet apartments anywhere. The building is fairly new so it has good sound insulation.