My wife and I wanted to experience Costa Rica in a way that made us try things outside our comfort zone. The day consisted of a meet and greet with the guides and others in the group, boulder scrambling, rappelling 6 waterfalls, swimming in a natural watering hole with a natural water slide, and beer with chips and salsa to end the day. They also give you a CD loaded with pics from throughout the day.
This is the only canyoning experience in CR that has you rappel in the waterfall. My wife and I felt safe the entire time. The views of the waterfalls, river, and wilderness were incredible. The group size was small, so there was plenty of one-on-one instruction. A great time, and a must if you are traveling this part of CR.