Out of the three I have only stayed at Catcha, and have slept in roughly half of the rooms on the property. I prefer the following:
Sky- nice new room on the second floor above Coral. Great balcony with a gorgeous view. Cold AC
Libra- rustic with a great wraparound deck. There is a daybed out there that is great to chill on, hell even sleep on. It is off to the side and is fairly private during the day until 5PM, when the place opens up it's doors to outsiders so they can partake at the restaurant/bar. It has AC as well.
Star- rustic two bedroom with AC and an outdoor shower. Great for two couples, just keep in mind that the walls do not go all the way to the ceiling, so you can hear what's going on.