In my opinion, That's Mandarin Summer Camp is a very effective and fun way to learn Mandarin not only because the environnment encourages you to speak and understand Mandarin, but because of the intensive yet fun classes. Personally, I found the school housing to be very accomodating from the building itself, to the people in it. Not only does this summer camp allow you to largely improve your Mandarin skills, but it also helps you get accustomed to the Chinese culture by offering trips to famous sights around China and also taking students to do everyday things such as taking the subway and asking for things in Mandarin. This camp is also very aware and accomodating to any issues a student may have and are always here to tend to your needs. I was personally so surprised as to how much Mandarin I would learn in so little time!