Great day trip, not cheap but you can't really go wrong. It's something that you've gotta tick off your list because as water temperatures rise it is slowly bleaching the coral.
The guides are a lot of fun, and although getting hassled on the way out of the falls can be a bit much don't let it get to you and take away from the fun you had climbing the falls. I'm the clumsiest person I know and I did just fine!
Love it and will definitely go back there again. It's such a unique place within the United States, there's nowhere else like it.. It has a very Caribbean feel to it (not the resorts part, the real life/real people part).
I stayed inside the Louvre for hours, still not feeling like I'd seen even an 1/8 of what was inside. It's good to tick the ol' Mona Lisa off the list and see her, but once you've done that you'll find yourself wandering around a lot! If you go to Paris during the winter, you'll also find yourself appreciating the fact the the Louvre is climate controlled.. A big plus when outside feels like being on a ski lift in a t-shirt :)