Hotel is located on the main street through Thessaloniki. At 3-high, you won't be bothered. Balcony is not really an advantage, after all you are on top of traffic. Parking is possible in an (expensive) parking garage or on the street (very difficult longer than 1/2 hour). The rooms are cramped but functional and adequate. There is air conditioning and a fridge, soaps and bathroom gowns. The breakfast buffet is adequate/good.
Tip: you can buy a bus ticket at the Yes! shop 200 meters away or at the ticket machine in the bus (not from the driver). One way €0.60pp, trips to the airport €2