The trip was a great experience. I 32 y/o male from US travelling alone was in a group with two sets of Spanish families. The guide made sure that I felt included and that I was tracking along in the conversations. The trip itself was a very long day. There was a lot to see, and I wouldn't necessarily change the itinerary, but I would suggest the time is better reflected. It was a 14-hour day for me, which was long.
The access to the ruins at Chichen Itza and Coba was amazing. We were at CI early enough that it wasn't oppressively hot, and then the lunch time dip in the Cenote was very welcome. The description could include bring multiple changes of clothes because you really could go through 3 outfits after all the sweating and swimming.
The buffet lunch was unimpressive but provided fuel to get through the day. The shuttle arrived right on time in the early morning, which was great.
Overall, a great trip. A bit more planning/communication about the activities of the day would have made it more comfortable, but nothing that would make this a deal breaker.