PGW, we stopped by Rooms in June. Didn't tour much of the property, but they have a wide and deep section of beach and a walled-in sand area with loungers that gets no higglers. We had a BOGO drink, Big Bamboo, at the beach bar. Not good. The bartender was a kid and had to look up how to make it. Not enough ice in the drink at first. Also, the place just had a weird vibe to it. Even Tam picked up on it. We've not been to Fun Holiday, so absolutely can't comment. Me, if the amenities were close to equal, I'd go by:
1. Location
2. Price
3. Reviews from this site and others
Good Luck PGW, looking forward to meeting you, Tic and others over that NYE week!