We were passing by and only spent one night here, but it was a very nice place.
It was very clean, and even though the building it's in is an old one, the apartment itself is recently renovated and with modern furniture. Very comfortable and pleasant to stay in.
We were also very impressed with the multitude of snacks and other types of food which were provided on the house, plus also a few bottles of water in the fridge. Very kind and thoughtful of the host.
The location is very good and close to downtown city and most visiting sights. There are a lot of things to see within decent walking distance.
The host - Vassilis - is a great guy! Very warm and sociable, he will help out with anything he can.
We did not like Thessaloniki itself, but that's another story :) This city is just not for us. It's extremely crowded, it's almost impossible to find a parking spot and we actually had no choice but to leave the car in a paid parking space which costs 12€ per night.
But we totally recommend this apartment, it's a very nice place and is worth it!