My family of 7 stayed this August. The house is wonderful and the location is absolutely stunning. We were met by our host Angelos who could not have been more helpful with the house, car services and even helped in arranging a sailing trip around the Islands. Everything in the main house and the next door suite is modern and in working order and I believe the photos and description online were extremely accurate in describing the property.
We truly enjoyed the outdoor space with views of the sea and sunrises (yes I got up for those). Late afternoons by the pool were very much a highlight.
One thing to be prepared for is that the house is not easy to get to -- you will either need to be comfortable driving a car on Mykonos (which I tried and failed at) or be prepared to pay 50 Euro for each trip into Mykonos town or to the beaches. The drivers are good and well worth the money in my opinion (also arranged through Angelos).
All in all --- an extremely beautiful property in an incredible location.