Pretty awesome. I'll start with criticisms: made an 11am reservation when we ordered online to get the 10% off the $79 , our guide wasn't meeting us at the first Cenote until 11:40, so we didn't start the tour of the other cenotes until we were hungry for lunch, so we didn't spend much time at each Cenote , then we did the underground river, and ate lunch at 2 pm. The horse-drawn train stops running at 2:30, so we didn't ever really get to go to number 4, but we got the package that included number 5 which was pretty awesome but you can't go to it outside of the tour so make the most of the time you have there. After a delicious lunch it started raining like crazy which didn't stop me from enjoying the second and third cenotes for a while before they shut down at 5. You should probably get an earlier time to start if you want to make the most of each Cenote, pretty amazing, there are a few kayaks just left at a few of the cenotes that you can use and people are pretty good about sharing, we went on a Monday and almost had each Cenote to ourselves. When you are in the underground river make the most of the time that you have because you move on from each of the rooms after a little while so explore around anywhere they let you go but please please please do not break off any stalactites, what a shame that people do that. I just kept my helmet on and moved my mask over the helmet when we got out of the water, so I didn't waste time trying to get my helmet back from the guide in between activities. Think about bringing a tip for the waiter for the lunch that was included in our package so you might want to put a couple 20 peso bills in your swimwear. Also you are only able to use a snorkel and mask during the beginning portion of the tour, so make sure you use that as much as you can each one of the cenotes you do especially the first one and the fifth one, they don't let you take the snorkel in the underground river but they do let you take the mask. After the underground river they take the mask back even with the full package so that was kind of a bummer. And as soon as you finish the underground river they have a big tub of bug repellent you can wipe on, I would highly recommend using it as soon as you get out of the underground river, over the course of two days I got 310 mosquito bites most of them where the day we were there. This would be an amazing place to take your children if you are visiting Quintana Roo Mexico, because it's so affordable and allows both the guided tour experience and the free time experience your kids will absolutely love it! Skip the drama and trouble of driving around to a bunch of different cenotes where your kids will get tired of it and come to this one place where they get all the different kinds of experiences in one place for one good price. Now on to the positive aspects, I definitely loved everybody that worked there and their contributions, though our tour guide didn't speak great English he was friendly and much of the welcoming staff were just super friendly and nice and helpful. They even told us about the 10% off deal online. Buy a waterproof phone case before you come to Mexico because they are twice as much but I would not visit this place without one because you will definitely want to take pictures of your family and of the beautiful underwater formations and the neat little fish that nibble your toes tickling them. read more