The Royal Hotel is fairly convenient to Thessaloniki Airport, a 10-15 min taxi ride that costs about 20-25 Euros. Getting there does require a bit of a crazy turn around due to poor street planning. Staff were friendly, breakfast was fabulous, the area was quiet. For me, the bed was a bit soft, but I like a hard bed. The beach and Peraia are close, but you will need a car or taxi to get there. Driving to Thessaloniki is about 25-30 min.
Overall, this is a great place to spend a night coming or going to the area around Thessaloniki, but not really a destination in and of itself. I believe it was good value for one night near the airport.