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This ball will not completely correct your slice, but it can help. Just like any ball or training device, you have to meet it half way and have SOME skill. What I mean is if you shoot 110, don't expect this ball to get you into the 90's after one or two uses. It takes some getting use to, and don't forget to reposition the ball in the fairway with the arrows pointing towards your shot target or else you'll end up with a wild shot. It's good when you're playing by yourself or with a close buddy who won't fuss at you when you touch the ball after every shot. Also, I don't like the way it putts, so I replace the Polara with a Titleist or Callaway on the green. These balls are rather pricey and for the money, you may be better off trying the Top Flite XL 7000 Super Straight.