...I think the podcasts are really good. The grammar explanations are well done, they give good attention to teaching proper tones, and the subject matter of the lessons is on par with what Chinese Pod covers. They certainly don’t cut any corners. And since the teachers aren’t all from just the mainland or just from Taiwan, listeners are exposed to the slight accent, vocabulary, and tonal differences they’re likely to encounter in their daily encounters with Chinese people from different areas of the world.

I have a close Chinese friend who listened to some of the recordings on my IPod - she said go with CLO. She constantly remarks on my great accent which she says is always the biggest problem.
I travel a great deal and knowing Chinese, even a little, can only be helpful when 1/4 to 1/3 of the worlds' population speaks Mandarin Chinese. You are doing a great job - I seem to be going very slowly; however, my friend says I am not but rather she is impressed with where I am and again is most concerned about the correct accent.