I have a few of my Dad's and his Dad's Craftsman tools. I was impressed with the warranty.
I bought a set of CM when I went off to school 3 hours away and needed to keep a used car running.
While in school, the gas station I worked in had a mix of SK, Proto, and ???.
Dave, the 1 and only mechanic, had a well used set of SO; which only he touched. On rare occasions, with permission, I would use them for a hard to reach bolt.
I didn't see the value in the cost of SO. But I did prefer my CM over the rest of the choices.
When I worked in a repair shop, after finishing school, I bought truck tools (SO) as needed. I realized the benefit in the SO quality, and had the $$.
Fast forward dozens of years after leaving the wrenching jobs, now I am able to get a manufacture's industry discount (>40%) on SO.
I beging to replace and add to tools with SO. CM -V- still hang above the bench for quick light duty jobs; but, serious wrenching - I reach for the SO. Stored in a minty vintage set of KR-5x7 SO boxes.
They feel right in my hands and I know they will do the toughest jobs.
Oh, BTW. The Other site is the 'Dark Side'.
