It was a truly perfect stay for us in Thessaloniki at Kostos' place. Comfortable check-in and check-out. A really well designed and clean flat with 2 balconies. Everything you need in the kitchen (big cutting knife or wine glasses, for example). We were able to park in a parking lot for really cheap 10€/day with 24h access to this parking with our own keys. We would recommend this apartments 10/10.
By the way - he was the only host in years who offered us help with the bags.