We stayed at Katerina's place for 5 nights with four couples and two toddlers. Prior to our stay, I requested a high chair for one of the kids and two toddler cots, which Katerina had setup before our arrival. The villa is about a 15 minute drive from mykonos town & airport and about 20 minutes from the beach/night clubs located on the southern part of the island. You definitely want to rent a car if you choose to stay here. Be sure to rent something small as the roads leading up to the house can be very narrow. The Agios Sostis beach is a 1 minute drive down the long driveway and road from the house, you can walk it, but I do not advise it with young children. You can drop off family members near the kiki's tavern that has a small path that leads to the beach, or you can park right on the side of the road and walk down a rocky path. We stayed here in mid-August and the northern winds were not an issue during the day, at night the winds do pick up a bit so you want to make sure you have belongings weighed down on the back porch.
Pros
-Katerina is a great communicator, fast response
-Huge property, with plenty of windows and doors
-Modern, Clean, large indoor and outdoor living spaces
-Pool is great for cooling down, especially for kids
-Short trip to the beach
-Views
-Air conditioning
-Bathrooms plentiful
-Full kitchen with appliances and utensils
-Comfortable living
-Charcoal BBQ
-Super early check-in
-Housekeeping crew
Cons
-1 bedroom did not have air conditioning (ended up not being an issue as there are plenty of space in the living rooms to use for sleeping)
-Mosquitoes (host does provide pest control solutions, but it had no effect, my parents legs were eaten alive and my son's and nieces faces looked like they had the chicken pox. Once again it did not bother me much, but I think more could have been done here to manage expectations)
-Hot water (couldn't figure out if the hot water heater was solar powered, or that the house had a limited amount, but by 5-6 pm hot water was not available. )
-Sewer smell in the bathrooms on the first couple of days ( this can easily be avoided by pouring vinegar down the drains/traps; after the housekeeping crew came in the smell was gone.)
Overall good stay, but for a $1K a night my expectations are a bit higher. I would stay at Katerina's place again.