This guide was the most passionate, and knowledgeable person I had ever had. He had a number of facts, and interesting figures about these varied species and I thoroughly enjoyed my experience. The entry fee was more than reasonable at around $10. We were suggested to walk there from the town centre which for anyone used to a short hike would be fine, it was all up hill and took around 40mins so would perhaps suggest a taxi. My only suggestion would be that they get together a collection of bat related souvenirs and they had only a handful of t-shirts for purchase. A must see for anyone visiting Monteverde, or the Costa Rica area.