We visited Curi-Cancha during a three day visit to Monteverde. We also hiked in Monteverde and enjoyed that too -- more primary forest. But our guide, Rafael, was super fantastic. We did a four hike with him starting at 7:30 a.m.
This was our third trip to Costa Rica with our kids (age 6 and 9) and Rafael was hands down the most knowledgable guide we have ever had. We saw bell birds, lime toucans and queztals with Rafael but he also told our kids (and us) some really interesting facts about the native plant life too. I appreciated that the reserve was less crowded than Monteverde. I recommend visiting it if you are in the area and drop Rafael an email to ask him to show you around.
His email is Rafael Elizondo Vargas <firstname.lastname@example.org>