Great links Denise. Definitely click on Denise's second link and read my trip report about Azulik. If you are wanting "luxurious", you definitely want to read this and make sure it fits your description of luxurious. It is luxurious in comparison to the other cabanas at Copal, but in my definition, it would be closer to "roughing it".
No A/C definitely doesn't qualify as luxurious to me. I never finished the trip report, but definitely got a thorough and accurate report about Azulik in. And my husband and I both agree that our stay there was, by far, our best and most romantic trip to the area.