I am a System Engineer for a US firm that sells in Asia. On my last trip to China, I was frustrated by the business dinners which are spoken exclusively in Mandarin while I sit silent. Chinese Track was exactly what I needed to decide to seriously try to learn the language. I had to recently go back to the beginning when I decided I wanted to also learn characters but I am back to level 5 now.
Thank you for giving me the opportunity to learn on your site. It has really had a major influence on my engineering skills and my work ethic.