Originally Posted by AC/DC
Quality is in the heart.
I like that. It doesn't matter what product anyone uses, if they don't care, or are lazy, the result will be good only by accident. A place where I once worked had a sign on the wall:
"Perfection is our goal, excellence will be tolerated."
Now at first I dismissed it as so much marketing bulls**t, but the little motto has stuck with me, because once I admitted it, it's exactly how I approach my work. Knowing only the Almighty is perfect will not not stop me from approaching as close to perfection as possible in my own small way.
THAT is quality.
As to clear, it seems that most of us operate on trust, and the reputation of the company from which we buy our stuff. Sometimes that trust gets violated, but most companies know they have to put out products that do what they say they're going to do if they want to be in business for the long term.