Totally cool activity, if you like a little bit of adventure. Good in any weather, because you will get wet anyway :)
In our group were 10 participants + 2 instructors and the activity was totally safe. Instructors were nice, funny, communicative and didn't push anybody to do something he/she didn't want to do. Jumping and sliding of the waterfalls was quite fast, but the roping down took sometimes too long (for 10 people) and while waiting one started to feel a bit cold in the water/wet suit. It would be superb in smaller group.
But still, this is the best activity you can do on the island!!!
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