I use them directly from the guitar... The ones I have are (I think) the .155 as they seem the same size as what I used on my pedalboard and rack connections later.
I have 2 cables and I got them on a whim when I ran across the premade cables in a guitar shop while visiting Las Vegas. they have the "long" brass connectors that use a small set screw.
I've never had any issues with the connectors on them. I've probably been using the same 2 cables for 15+ years.
I did occasionally have an issue with the patch cables that I made for rack and pedalboard use. I think that was only with the "thumbscrew" right angle connectors.
But honestly, I really liked them in any case. I could quickly make a bunch of custom patch cables of the exact length I needed and only required something to cut the cable.
The things I don't like about the George Ls as an actual guitar cable:
- They have a tendency to get twisty in a weird way - start to wrap around themselves
- There can be some "handling" noise - most likely the .255 cables have better insulation
All that said, I'm interested in the Best-Tronic cables now. I'll probably grab one to see how they compare.