We stayed at the Carribean Reef Club (formerly, Villa Marino) in Puerto Morellos, a few miles south of Cancun.
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The CRC from the beach
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Pool-side... our room was on the second floor at the end.
Looking down on the pool from our room
Breakfast on the deck - note 3 mast schooner at the dock
Hot tub at the CRC - One night we had a visit by a huge racoon.
Playa del Carmen - One hour by bus south from Puerto Morellos
From Playa del Carmen we took the ferry boat to Cozumel
We also took advantage of the bargains in Cancun.