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Jeff D.I picked up a copy recently and was reasonably impressed. Unlike the regular monthly and bi-monthly Beckett price guides, the prices seemed mostly accurate (from my experience at least). They seem to have done their homework both on ebay and major auction houses (they mention REA and Mastro, among others) and this seems to be reflected in accurate market values.
I also like how they mention that they mainly used SGC for pre-war, PSA for vintage and BGS for modern in determining values of cards from those respective eras.
I was pleasantly surprised, and while it isn't something of which I'll need every new issue, I'll probably buy a new copy in 6 months to a year.