It's a nice studio almost in the center of the city. You could reach the most remarkable points of Thessaloniki within 15-30 minutes on foot. Next to the flat there are supermarket, fruiteria and small taverns (one pretty good is in the same building but on the other side). The studio has a really huge balcony which we did't use because of the not very good weather during our stay but we think it's comfortable in the warm time of year. In flat there is the air conditioner and heater for making the comfortable tempurature.
The hosts Paraskevi and Kontantinos were easy and pleasent in talking. They gave us some tips about the city that were useful for us.
So we highly recommend this flat for staying in Thessaloniki!