All sum up and put in one word - "Great" stay. Starting from communication with the host, cleanliness of the apartment and over all expirience.
Since parking can be really problematic in Thessaloniki it was actually great that host even provided a private parking for our car at the building premises and responded to all our requests and questions on time.
It is a bit uphill location but in a walking distance from center and about 12-13 minutes walk to Aristotelis square and Thessaloniki promenade.
Neighbours from above the apartment with their little kids knew to be a bit loud from time to time usually in the morning hours, but nothing annoying in the late evening and sleeping hours.
So over all great stay and i recommend it. Everything else was as described.