OK it's my wife's 30th birthday and she wanted to go to a cenote so I was doing a lot of research. I think there are a lot of options on Viator when it comes to ATV, Zipline and Cenote. I think they all go to this location called "Eco Park", 1.5 hours from Cancun Hotel Zone. I'll go through all details in sequence. We booked the 8am tour.
Some background before reading further. Hey you are a tourist and they are a business. They are going to suck as much money out of you as possible and it's their job. It's different than a vacation in US where culture/ideas are different.
1) Pickup. Got a message night before that driver will be there between 8:10 and 8:25am. We read the other review that they were late so we decided to go down to lobby at 8:20am. Guy was there. We got in a van and there were two other people already. So I think it depends on what position of pickup you are in. We were supposed to have 13 people in our van and 3 of them were no shows. The guy went to the hotel, didn't see them, took a video for evidence and left. So make sure you go in the time they say but understand that you will have to wait. The last pickup was around 9:10am so yes those people would've waited at least an hour.
2) Drive there. It was okay. You lose signal when you get inside the park and there's 5 Km of ride which is super bumpy on dirt road (that's where you will ride ATVs). You will also see many other zipline/cenote signs so there are multiple groups/places.
3) When you get to location, they let you use bathroom, walk around etc. They have shops. Will sell you on bandanas for ATV, souvenirs and there's drinks. You can use credit card here. They say 5-10 mins and then we'll get started but that's Mexican Minutes so they make sure you spend as much time and buy something.
4) First activity ATV: this was my first time doing this so can't comment if they were worn out but they didn't look brand new. It took me a bit to get used to as mine stopped three times. It lasted 30-35 mins and i was honestly done after 20 mins. Keep in mind this is VERY bumpy. Your back might hurt. Go slow. Don't try to be zealous. We had one group that crashed into a tree going fast and had to pay $110 penalty. If you are worried, you can buy $5 insurance which is optional to be safe. Have a mask or cover your face because it gets VERY dusty. My throat is scratchy next day. Trick here is to either stay in front of the group with the instructor or way in the back and there's another person that follows you. Middle people can get stuck or stop and instructor's might not notice. If you have back problems, shoulder problems or pregnant, please don't do this. Other groups had helmets but they didn't give us any which I thought was weird.
5) Second activity zipline - I've done it once before but was still a bit scared. Got over it after 1st one. They have 4 ziplines and this lasts about 30-40 mins. They strap you up and you walk to the bridges. You can do tricks if you feel comfortable. The last one they show you how to go upside down which was super cool.
6) Cenote: from the outside, it looked wack and wife was pretty bummed because we saw picks of others online but it was cool. There are many different ones - open cenote like the one in Tulum, large cenote with a waterfall (Cenote Samaal) or Cenote that is in a cave. This was a cave one. You have a hole that you jump into (I think he said 40 ft jump). Do this as this is once in a lifetime opportunity). Don't think, just jump and grab the rope after you come back up in the water. It'll help you get back out. Keep in mind, you get life jackets so my wife who doesn't know how to swim also jumped. Inside the cave, it's pretty cool. There are bats!! Don't be scared tho. They don't harm you if you don't bother them. You have 30 mins for cenote.
7) Lunch - it's misleading in this listing cause it says snacks but it's a lunch. Not fancy btw but three tacos with chicken, rice, vegetables, salsa and onions. Then you have water and hibiscus drink.
8) Closing and Pictures - this is where they make the money. After tour is done, they will come around and say if you have any feedback etc, then ask for a tip. I gave $5 USD. Pictures...they took pictures of us while ATV, zipline, cenote. They recorded video. Once you come back, they quickly organize them in folders and come up to individual groups to show the pics and sell them. It's $150 for the pics. I'm super cheap so I thought that was crazy. My one way flight from the US was that. I was like no way. Plus I didn't have credit card and not enough cash. You can take pics/videos for the cenote portion but not ATV/zipline. If you wanted to do cheap option, you can take pic of yourself on ATV after you're done or have someone take it. You're just gonna sit on it. Same for zipline. You can get your phone after the last zipline and take a pic when on the bridge. But if you are good at negotiating, you can negotiate here. Again, they are a business and will try to sell you this. But if you say no few times, they won't bother you.
Then, the drive back to hotel. Overall, great 1st time experience. 4 stars because no helmets for ATV, lunch could've been better and wish they had option to pay for individual pics/videos and not only package.
If this is your first time doing any of these, do this!