We had a great stay at Nikolas' apartment. We arrived and checked in on Friday afternoon and the guys were very eager to help us and tell us about the city. However, as we were there with locals, we didn't really need it. The flat is very nice, sunny and very clean. Location is also excellent as it is right in the centre of the city but still in a very quiet street. So, overall a great experience and a great stay in wonderful Thessaloniki.