CD Cutting and / or Trimming


I haven't seen any discussion concerning this (although there probably has been a thread or two). I'd like to know what your opinions are regarding CD cutting (Trimming). Is it noticibly beneficial or is it just another opportunity to spend money.
pkemery
Here's some reading you can do:
http://www.iar-80.com/page53.html
I've had about a dozen disks cut, by a friend. The improvements range from subtle to very noticeable. Nothing negative that I can tell, so far.
Sonny
Busics2: have you tried this process on the XRCD format? If so, where there similar improvements, or were they more modest?

Thanks,