I stayed for 9 days in Gregory's apartment and it was perfect. It is in a good location in the centre of town. There are lots of people around but as it's on a pedestrian-only street, it is quiet and peaceful. The apartment has been nicely modernised and has everything you'd need for a comfortable stay. It's near cafes, restaurants and high-end shops and department stores. I recommend this apartment and would stay there again if I return to Thessaloniki.