Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Careful, "expensive" does not mean "good"

Buyer beware. This is a mere 23 minute long introduction shot in old video-quality burned onto a dvd-rom. It's worth maybe $5. They ought to be ashamed of themselves for charging $60 for it. As far as content - it's a pretty good 23 minute introduction. If it were $5 i'd give it a good review. You need to look elsewhere for more in-depth information - something like a 4 DVD set that's really worth $60. Also, they say that there's more information on their website - well, it seems you can't even get to that website... I wasn't "authorized" to view that page.