Alex and Petra's place is an excellent value. The apartment has everything a guest could need, including great AC and wifi, even a washing machine! The kitchen was well kitted out and even had coffee fixings available for us. The apartment was very convenient to several different buses into town, and an easy walk to lovely restaurants by the beach (try nearby Nia Diagonios). Petra was very responsive and helpful in directions to her place, and she had an awesome book for guests with information including places to eat and see. She even called a cab for us to bring us to the airport early in the am, as the bus route there is somewhat long and roundabout. We really enjoyed Thessaloniki as well. There is a cultural bus 50 that leaves from the white tower hourly to all of the tourist sights for only 2 euros, and Petra can recommend a great restaurant in the market (Cafe Mitsos-try the fish flambeed in raki). Overall we had a fantastic stay!