5 Ace Counting Question.

Hi again y'all....

I bought a counting stratedgy called The "5-Ace" BJ Counting System. It says basicly you count the aces and the 5's only . If more 5's have been played than aces, player has an advantage (because a 5 can turn a dealer's hand of 12, 13, 14 and 16 into a "standing hand." If more aces than 5's have been dealt have been dealt, the dealer has an extra advantage. Then it tells you how to raise and lower your bets accordingly, etc.

What do you think, does it have any value?

Jimmy