Went on the Extreme Zip Line Tour through RCI. Don't think there was much difference between the regular trip and the Extreme Zip Line Tour. The guides were EXCELLENT. I felt safe the entire time, the views were wonderful and the whole day was a joy. Be prepared for a little hiking with a few uphill climbs. If you are on the later tour make sure you bring water as I heard they ran out. Bring something to affix your camera to your body.
After the worlds longest tender.Went on the historical walking tour. The guide book said it would be a quick 2 hourish tour. 3 1/2- 4 hours later, it got a little old. Great tour, amazing guide, very informative. A great way to see the city, however the worlds longest tender on the way back was not a great way to end the day.