I was in a group of four, and we were trying to decide between Mundo Adventura and Sky Trek. I'm so glad we picked Mundo Adventura. Some of our friends did Sky Trek, and we heard about their ziplining experience. Sky Trek has the highest zipline; however, Mundo Adventura has the LONGEST zipline. Mundo Adventura also passes by two waterfalls - one of them being La Fortuna waterfall.
I was worried that I wouldn't be able to stop or that I would get stuck in the middle of the line, but I didn't need to worry at all. Once you see the first person zip, you get so excited. There are 12 lines total, and the first two are practice lines. The two longest lines are 600 meters and 900 meters. This gives you a chance to really look at the scenery below and around you.
There is a hike up to the first line. If you're in good shape, it shouldn't be too difficult. I thought I was in decent shape, but I was out of breath from it. You don't have to worry about anyone leaving you behind. The staff is very friendly and knowledgeable.
I feel like Mundo Adventura gives you more of an authentic ziplining experience. I definitely recommend!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.