I did 2 Tours with them, with 2 different Tourguides and can highly recommend it!
The first one was in the morning at Curi-Cancha Reserve, where we saw a Quetzal, different types of Hummingbirds, Howlermonkeys and a lot more. The Curi Cancha Reserve itself is very beautyful and quiet, i went there again in the afternoon for a long walk and would definately go again.
The Nighttour was at the Wildlife Refuge Monteverde, where i saw a Slot, Scorpions, a Salamander, Snakes and Birds, such an experience, a musst do while in Monterverde! I had so much fun, they really do a great Job!