The check-in process went smoothly and the location is perfect. Everything was clean and tidy. However, the wifi didn't work properly during my whole 7-day stay in the room called Thalia (signal wasn't strong enough), unless I sat next to the door or by the lift area. And no, it was not my device's problem as I didn't have any issues connecting to the internet elsewhere in Athens. I hope Alexandros can get this fixed.