I live here in Costa Rica, and own my own very small lodge/retreat. We just got back from taking six friends to Rafiki for a fantastic day of horseback riding and awesome white water rafting.
Not is this only my personal favorite way to spend an adventure day, but when our friends only had one free day I insisted that this was the one thing that they would need to do to get a real feeling for what makes Costa Rica so special. On top of that, we have sent practically every couple who have stayed with us at our retreat to take a ride with Rafiki as well.
This is a family run lodge who really and truly care about your experience. As well, they have a very special involvement with their surrounding community, and their surrounding environment.
Their guides who they use on the river are exceptional, truly exceptional and I always leave, exhausted, but with a big smile on my face knowing for sure that I will be returning.