CLO is progressive so it helps reminding the bases and the written language (thanks to the new feature that teaches how to write the characters). It is also a real online "tutor", and everyone knows that repetition is the only way to learn a foreign language with efficiency. I also use Chinesepod as a complement for spoken language. I think these two chinese podcasts should not be considered as competitors, but as complementary tools. I hadn't spoken chinese for three years until I found your website. I am so happy to recover my former level and even more. Kirin is really a fantastic teacher (One on One). Thanks.