Cozumel is an easy island to navigate because of its size. Getting to Cozumel is easy with international flights arriving daily. A flight from Cancun on MayAir is a quick 15-minutes. Ferry service from Playa del Carmen is frequent and only takes 35-minutes.
Cozumel My favorite place to shop. Must haves are the vanilla, pottery and those Mexican blankets. Bring the husband, you'll need a pack mule. From RCCL ship, you'll need to take a cab to The Forum Shops (jewelry, etc) and work your way to the other end.