My husband and I did the jeep tour. If you like being tossed around in the jeep it's fun. My husband and I really enjoyed it, loved the beach part. The ruins I was disappoined in, because I didn't know what to expect. It was a very small concrete building.
That was it, you didn't go in it or anything. But the tour guides did a good job explaining about it, just NOTHING to see. We thought it a bit pricey for what you got after talking to the people who did the catamaran tour - it was 40/each whereas jeep was 75/each.
We talked to other people on our May cruise and they had done
the catamaran tour and just raved about it. It sounded really awesome, so if my husband and I go again, that's what we plan to do. Now on the jeep tour we didn't get hardly any shopping done in Cozumel, so if you want to shop you did to consider that.