Apple Computer Corporation has made hundreds of billions with Samsung as their main supplier of screens and CPUs for their most profitable product -- the iPhone. So there's at least one company that has had a great experience working with Samsung.

I've heard my chip designer friend mention in passing that the "Chinese wall" between the Samsung fab group and the Samsung design groups is occasionally porous.

I've heard multiple bad experiences. No good ones.

Even at the consumer level: go purchase a new Samsung TV and read their data-mining TOS.