Excellent all round - booking, communication and pre-arrival information, check-in and meeting caretaker (Jo was great), accomodation, outside area, complex, beach and pool.
We had a few weeks island hopping, and as a family of 4 adults we agreed this was one of our favourite accomodations on the trip. Very well presented inside, with aircon in both rooms greatly appreciated. Outside area was also a favourite - great for lazy lunches and evenings after touring the island and Chora. Location is just outside the madness of town - close enough to get in and out easily - a hire car is recommended. The Costa Ilios complex itself is also excellent - pool and beach with the added bonus of avoiding the worst of the summer meltemi wind. Great swimming location when other beaches are being hit by the northly winds and sand storms. No problems in this location.
A credit to the owner, and an excellent place to stay on Mykonos.