We went last year with our two DS's (13 and 16 at that time) and they did the teen Junkanoo Jam at Nassau (went out on an evening boat tour with music and dancing) and the Wild Side at CC. If they're into music and dancing the boat ride is probably worth it. I got mixed reviews from my boys. Both of them loved the Wild Side at CC; it's a pretty good deal for the $ too.
On another note asside from the excursions, it didn't take the boys long to get in with the other teens. Once they find the Common Grounds area you may not see much of them. If anything we had a challenge trying to find our boys long enough to take a picture - to at least show we were on the ship together! .
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