My wife an me had an excelling experience in staying at Giannis apartment.
Giannis and his wife had welcomed us, everything was on time, apartment is superb, modern and spacious, with great interior.
Both me and my wife suffer from allergies, but we didn't have any issues while staying in the apartment, which is exceptionally clean, new and well maintained.
Giannis is a great host, being available at all times, with valuable information. We've have visited Thessaloniki many times and usually staying at the hotels in the center. My wife was a bit skeptical in using Airbnb, but she also concluded that no hotel we've stayed previously matches the standard of the Giannis apartment.
Next year, if corona situation will allow it, we'll come to Thessaloniki again, and our first choice will be to stay at Giannis place, if available.