I cannot recommend this place enough!! My partner and I stayed and loved every minute. Christoforos and Maria were extremely helpful. They met us where we were dropped off and helped us with our luggage while giving us a mini tour of the area, and remained very helpful and easily contactable throughout the trip.
The apartment is incredible! It is a very comfortable bed, very clean and incredibly well presented with an amazing view of old port. Despite the location being very good (on the water, close to lots of bars and restaurants, close to transport) it is still quiet. There was incredible attention to detail and everything we needed was there.
The only problem with staying in this place is that the room is so nice you won't want to leave to explore the rest of Mykonos.