Nice, coachcap- we would definitely go back (or check out their other properties).
kjk - Not sure how long you will be there. Believe me, you can spend your entire time on the resort and just relax and enjoy. We were there for 10 days and picked our spots... we didn't do the usual Cancun tours or Mayan ruins. The resort offered a day trip to Isla Mujeres, which was nice just to get away for a bit. Very common to rent golf carts and cruise the island, which was neat. Our favorite off-resort excursion was a cooking class. It's not offered via the resort, but we saw it was very highly rated on TripAdvisor. The resort did coordinate a round-trip cab for us, and the fee was reasonable (no need to haggle in my broken spanish). The hosts are wonderful and the food was awesome. More info :
http://www.cancookincancun.com/
The last thing was a splurge - I drove 5 laps in an Audi R8 at Exotic Rides.
http://exoticridescancun.com/index.php
Was it worth it? Ehhhhh... glad I did it, and the R8 is one of their few "reasonably" priced cars. The track is small though, and 5 laps is over before you know it.
But by all means, if you just stay on the resort - you will not be disappointed. We spent a lot of time at the swim up bar...