We had the pleasure of staying with the Alissachni for a one-night visit during their first week of opening for the season. The staff were all very amiable and helpful during our stay. Some of the service will need some smoothing out, but I'm sure this will come with more experience during the coming weeks and months.
Our room was very large and spacious with a lovely view over the sea. The jetted tub is only heated to a small degree and will rely on the sun's warmth to bring this up to over 30 degrees - please be aware of this if temperatures are still low during your stay.
The view from the restaurant and terrace is gorgeous; a perfect place to watch the sunset and enjoy some drinks. The food was of a good standard but I would suggest that the menu has some additional options (more sides for mains e.g. a salad as only main salads available?) The cocktail menu was still under development, but the bar manager was very knowledgeable to make a range of drinks.
The complimentary transfers to/from the port or airport were much appreciated, as taxi costs are very high on Mykonos.
I would also note that a 5-star property could offer more eco-friendly options such as filtered, reusable glass bottles for water, rather than so much plastic but I'm aware this is a wider problem in Greece overall. Perhaps something to look into for the future if possible?
Overall, a peaceful and relaxing stay, and I would recommend booking this gorgeous property for a wonderful stay on Mykonos.