I've been studying Chinese in Holland for 1 year and then I decided to go to China to continue my studies. I looked through many schools but my choice fell on Gi2C Group since they offered me a comprehensive Mandarin course that I had been looking for.
I studied with them for 3 months, 20 hours a week. Also the cost was almost twice as less than any similar program I could find. They also replied me almost instantly every time I had a question.