You mean Labadee?
I haven't done any excursions there. Mostly because it's rather expensive, because you can only book through Royal. But the zip line looks like fun.
But overall, we just hit the beach. Adrenaline Beach is a short walk away and faces the Caribbean. We've found it to be a bit rocky and I'd say the majority of beach goers head there.
Columbus Cove is a bit tucked away and the waters are calmer and the floor less rocky. With less people, it's a little less frenetic and easier to get food/drinks. Negative is that going back there is no water shuttle so you have to take the tram or walk back through the vendors village, where some of the vendors have been reported to be a bit pushy (I've noticed they're louder than in other ports, but I haven't encountered anyone blocking your path or anything).
Anyway, I've booked a beach bungalow at Columbus Cove for my August cruise. Not sure if I'll be keeping it but if I do I'll write up a report. 10 months to go for that one!