GLs cables and heads are really good and reliable. I believe the reason why some peeps out there get crackly cables are because some shops don't have a proper system in managing their roll of cables. I know of many great shops out there that don't take care of their entire roll of GLs cables by not cutting the ends properly, which allows the cable ends to be worn out faster and oxygen to enter the roll. (I shan't mention the shops here)
I've read in threads that GL cables can actually restore tone loss in your pedal line. I tried it personally by only introducing 1 GL cable into my whole line of effects and trust me on this, IT ACTUALLY WORKS! Passed the same GL cable to a few of my friends and they too find that there's more tone in the line after introducing that 1 cable at the end of the line. The rest of my patch cables, I'm using Canare GS-6 with neutrik heads from Mr Misse.
My suggestion here is this, if you can afford it. get GL for your whole setup. The quality is of a different world. Cost $2 per ft and $7 per head at Ebenex. (Should be the correct pricing) Otherwise, take the poor man's method like me and use cheaper, but still good patch cables like Canare, available at Luther or Mr Misse with neutrik heads, then use 1 GL patch at the end of your entire setup, or after the pedal that sucks the most tone. Trust me, there really is a big difference.
Cheers Guys
