My boys were 9 and 11 when we went. I have a review on tripadvisor.
http://www.tripadvisor.com/ShowUser...ort_Spa-Puerto_Morelos_Yucatan_Peninsula.html
We booked a pkg with transfers.
The ocean is safe to swim...just beware of the jellyfish warning flags! My son was stung!
There isn't that much night entertainment for adults. A singer in the lobby or the club. the shows are family friendly and my kids enjoyed it.
It is small so we felt comfortable letting the boys roam. We gave them in/out access to the kids club, so they would just leave if they did something too "kiddie" ie. coloring.
My kids loved it!!!! We are going to Disney in 2 weeks and quite frankly I think they would rather go back to Mexico! We had lots of credit to use on our Disney visa so Disney it is. I'm sure we'll have fun, but Mexico is soooo relaxing!