This was definitely my favorite experience in Costa Rica. We did the 7:30AM tour (based on another review that said that the 7:30AM tour had fewer people), and we were not disappointed. Our group consisted of my family (family of 4) + one other family (family of 6). The guys that were working were extremely friendly, safe and confident. It's definitely well worth the money (which is not that much compared to other zip lining tours). The views (especially the lat 4 or 5 zip lines) were AMAZING. The zip lines had really good speed (and I'm a thrill seeker). And there wasn't a lot of waiting, as I've heard there can be in other zip line tours in Monteverde b/c they take groups as large as 40. Also - there is a student discount ($35 for students) - so make sure to bring a student ID!