Amazon.com.au:Customer reviews: FRETBOARD MEMORIZATION Deck | 54 Guitar Flash Cards | Great Guitar Learning Gift for Guitar Players & Guitar Teachers | Guitar Music Theory | Alternative to Guitar Learning Stickers & Posters
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You need to know quite a bit about a guitar and theory before you could use this. This is just some random ideas out of some ones head, unorganized thought process. There is theory here if you can dig it out, but you will dig. It comes with no instruction, so not for beginners at all. There is no real methodology to any of it, and I personally found it useless. Although the person who wrote this probably understands it, it is doubtful you will either.DO NOT BUY THIS. Buy alternative books on line for scale and others.
I understood when buying them, as with all flash cards, they only work to the extent you use them, work with them, and put in the effort and time. For someone who wants to do that, these cards did help me.