I was in Aguas Calientes for four nights while visiting Machu Picchu. The food at The Tree House was delicious, and the cooking class was phenomenal. The class included a private lesson on how to make a Pisco Sour, how to make a superb Trout Ceviche (without a doubt the most delicious Ceviche I've ever tasted), and how to make a dish of Quinotto with Chicken and Parmesan Cheese. The class was fantastic and the food I made at it was as delicious as any I've had before. I highly recommend taking The Tree House cooking class and eating at the restaurant - it's worth the somewhat difficult climb up the hill.