Age old debate on here that I think is summed up easily. Do pro's, with tons more skill and practice, use them? Yes. So why wouldn't it be ok for amatuers to use them?
As stated, they are not a cure all, but they can teach you good positioning and at least take your mind off of one thing when slumping. I break mine out when I want to check myself, make sure I am not resisting against it too much or if I am, find out where and why.
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D <~~~~ Used to be terrible wiffing 10 pins. Now through much practice, can wiff any single pin spare at any time.
Darrell Guzman
guzmand19 - Yahoo IM and MSN screen names