Having stayed in many Airbnb apartments throughout Europe I've had the pleasure of staying at this apartment on a very recent trip to Thessaloniki. Tomas and Cristina proved to be very attentive, flexible and helpful when necessary.
As to the apartment I can say it's well suited for short stays and is ideal for couples. You have all the mod cons one needs in a home away from home while maintenance seems quite good. It may be somewhat crowded as the apartment is small though for short stays that's not a problem.
Aside from that the area is very quiet at night yet still within walking distance from the city's main shopping streets. The immediate vicinity has all you need: convenience stores, traditional Greek patisserie right across from the building's main door, fruit and vegetables stores etc.