Giuliano guided us through Curi Cancha reserve in August.   He is extremely knowledgeable, interesting, funny, and personable.  He took our family of five on a private hike through the reserve giving us interesting information not only about the flora and fauna but about life in general in Costa Rica.  If you go to a reserve in Monteverde, I strongly recommend a guide, and you will not find a better one than Giuliano.