We were just there this past January and stayed in a condo just down the beach from the ferry over to Cozumel. BEAUTIFUL!!! I liked the swim up bar the best ;-) ;-)
5th Avenue is full of shops and great places to eat! If I think of anything else, I will post it, but right now I forgot names of places and restaurants for you to try.
Carlos and Charlies is right on the corner of 5th avenue up from the ferry and is sooooo fun! The waiters dance and do jokes on you and others, lots of fun!
You'll love it!
Marcia.