The apartment was modern, clean and beautifully decorated.
The location was very good, it was about a 5-10 minute walk into the city center, but still decently quiet (Don't expect silence, Thessaloniki is a noisy city).
The check-in and -out was very uncomplicated and Theodosia and her friends were always available in case of problems or questions.
All in all a very nice place and a worry-free experience, I would come back any time.