Living in Beijing I was very happy to have discoverd "That's Mandarin".
Not only their teachers are very professionnel, they are also very happy in sharing their Chinese culture and knowledge. So not only you learn the language but you also discover their way of life, their culture. All this made it unforgettable.
They also uses the newest technology, when you study with them, you can download an APP on your smartphone on which you can review and prepare your next classes.
But most importantly, I really want to thank my teachers because they make me progress very quick and thanks to them I have a good level of reading, writing and speaking Chinese.
I recommend That's Mandaring to everybody who is looking for a good school to study Chinese.