The place was more than decent overall.
Our stay was pleasant in general and the location is ideal for downtown exploring.
There are many small bars and cafés around.
We didn't like:
1) The mattresses' quality.
2) The lack of a more straight - forward communication, as we tried to request an early luggage drop off, but we only received an automated message, which itself was non resolving.
3) There is no substantial heating in the bedroom. It relies only on the living room AC unit. So this might be something to consider in colder periods.
To sum up, it is a nice little place to stay on a budget, and if you plan to go exploring and bar hunting in the cool part of Thessaloniki's alternative neighborhood, with the above mentioned cons to be taken into consideration.