Bill Bastable is a good friend of mine, so I won't tell you that these tables are the greatest thing since sliced bread. All I will do is tell you what these charts are and who Bill is, and let you make your own decisions.
These tables are only 3 pages, there isn't a whole lot about the "how-to" of card counting; Wong's books are excellent for that. All these are is index numbers, but you can spend a lot more money for hundreds of pages of toilet paper from a John Patrick or a Bobby Singer and get a system guaranteed to make you a loser.
These tables use the Silver Fox counting system (2 through 7 = +1 and 9, tens, and aces = -1) and are for a game where the dealer stands on soft 17, and include insurance decisions. They are the product of many hours of running programs for each decision. Every index number from -24 to +24 are included, which is approximately 270 different index numbers. All numbers are rounded off to .25 true count.
Bill has had much success using these numbers in actual game conditions, mostly the 2 deck games in Biloxi/Gulfport and some 6 deck games on the Florida boats. He is a graduate of Monmouth University (1983) with a math degree and his father Charles was a full professor at Columbia in the field of accounting. He developed these numbers to help him with his own playing and decided to sell them so that other players can make better decisions. He didn't do it for the money (as he probably won't ever sell enough tables to even pay the publisher!) but to help players beat the casino. He likes to see casinos lose because he doesn't like the way they take advantage of stupid players, and the way they bar or harass anyone who is good at the game. Also he saw that there were no really accurate tables on the market and wanted to fill this void.