The apartment is beautiful, modern, and really clean, with good amenities such as a Nespresso machine. Shower was powerful, and there is a washing machine if needed. Check-in was very simple and communication was great.
The location is excellent, as it is surrounded by bars and restaurants, very close to the sea front and all main attractions of Thessaloniki. I didn't use a taxi at all during my stay as it was easy to walk everywhere!
I stayed Monday to Friday morning, and enjoyed sitting on the balcony in the evening with a glass of wine, listening to the sounds of the city and the music from the rooftop bar opposite, which could not be heard in the bedroom.
However, as others have mentioned, there is a nightclub below the bedroom window. I was only affected by this on the Thursday night. I would say ear plugs are a must-have if staying on the weekend, as it was almost impossible to sleep that night. In the UK I live in above a cocktail bar in a loud part of Manchester, so I am used to sleeping through noise, but wasn't able to sleep much through this! Unfortunately for me as well, I had a morning train to catch, otherwise I would probably have just gone out and joined in.
That being said, if I was in Thessaloniki again I would definitely stay here again and would recommend it to anyone else (with ear plugs, or those who will be partying all night anyway)! Many thanks to the hosts for an enjoyable stay.