With a few hours left of our stay at Excellence Playa Mujeres I want to give everyone that is about to travel there a piece of advice...
Bring insect (mosquito) repellent or buy some ($11-$15) at the shop when you arrive. We gave the mosquitoes a 2 day head start and finally forked out the $11 for a little bottle of insect repellent.
2 days was more than enough time for them to make our skin look like chicken-pocks, NO JOKE! I counted over 30 mosquito bites on one of my wife's legs (from knee and down)!
Don't ruin your vacation, I warned you! :)