I had a short but very nice stay with Evangelia, who was a very friendly and welcoming host. Her communication was excellent and she even called me on the day of my arrival to check that my train had in fact arrived in Thessaloniki. She also gave me some really great tips on where to eat and what to do in Thessaloniki.
My room was fine and as described, the bed was just a mattress on the floor but it was comfy enough. Evangelia kindly let me put a fan in my room because it was quite hot.
Evangelia's place is ideal for exploring and getting around Thessaloniki - it is just a 10-15 minute walk from the city centre and a 20 minute walk from the train station.
Overall I had a great stay and would definitely stay with Evangelia again.