This was an incredible experience for my first time ziplining! I am nervous about heights, but the guides were incredibly safety conscious and made me feel very secure. Also, you don't have to worry about braking for yourself - they take care of that for you. You were always attached to the zipline or to a tree on the platforms in between so I was never worried about falling. And the scenery was spectacular and quickly overcame my fears. They were great about letting us try different positions, including upside down. And at the end I opted into doing the superman zipline and it was incredible. Being on your stomach allows you to take in the views so much better. The food after was excellent too! I think this is an absolute must to do if you visit Manuel Antonio/Quepos.