There was a potentially hazardous issue with unsecured Ikea cabinet nearly toppling over on our kid while we stayed with Ioanna's. We promptly communicated this to our host, and she promised that she'd take care of it immediately. I have no reason to doubt this, she seemed like a sincere person, but guests with small children should still double check if this was fixed, just to be on the safe side.
Besides that, our stay was really nice. The apartment is located right in the very center of the city, within walking distance of everything, and with Thessaloniki's notorious parking situation this is a huge advantage (Ioanna's husband Kostsas helped us with directions to a free parking area nearby ). We could walk everywhere and still walk back to the apartment easily for the kids to have a rest. The apartment is newly furnished and comfortable, and the building is stylish, with a new elevator.