I lived in this apartment for 5 weeks. Stathis, although unfortunately we never managed to visit each other, is honestly really nice and helpful not only in words, but also in practice.
However, I received the apartment in a way that could not have been dirtier. Personal stuff (including even condoms, razor blades and so on) could be found everywhere in drawers and the bathroom area (generally, most of drawers and closets were already preoccupied by some stuff) and the place was full of dust and shells of sunflower seeds (maybe it had not seen a vacuum cleaner for a long time).
The shower basin was obviously not cleaned for months, as long as dirty slimy yellow spots were so big and spread everywhere that made me feel the worst when I was taking a shower (I did inform Stathis about it the day after my arrival, but he was not in Thessaloniki at the time, and some days later, his friend was sent to me, who just gave me a couple of detergents!). Upon my arrival, the bed and pillow sheets were not changed, they were recently washed and I had to wait for them to dry, needless to say that I had to change them myself too!
The towels (for which again I had to wait to dry), were so tacky that without exaggeration, were just pieces of cloths. So I actually bought one for myself.
Talking about connectivity, the internet's speed is so low that a simple video clip needs some minutes to be loaded.
Last but by no means least, one day I saw a cockroach in the bathroom (and killed it). Three days later I saw around 10 of them when I was bathing (although I never saw them again after Stathis sent his friend to spray the place).
The location of the apartment is almost great though (so close to some bars and restaurants and the city center).
Thus, as my personal conclusion, I can say that this place would be good just for a very very short period IF it was cheaper.