I haven't tried it out. I just assume glean as much as I can from online streamers for free, many of them give several great points, ideas, concepts, and suggestions.
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Is Yury Markushin material good? Is it too basic? Is it too thin? I think I would be better just investing that money into one phase of the game, then thinking I could really cover so many bases (indepth); or who knows maybe he does provide a substantial amount of key nuggets and quantity.
What say ye? http://www.thechessworld.com/supercharge/
Did you try it out?