by Robert
(Blackwood, NJ USA)
I have had the Mandarin version of Rosetta Stone for a couple of years. I bought it cause they had a guarentee. My fault for not reading more into it, but only a 6 month guarentee. I happily went a long learning the rosetta stone Chinese, and did not find out it was full of mistakes will my wife (who is from China) told me it was not correct.