Dlux is legit stuff. I was hesitant at first because of the price tag, but it is more than worth it. I coated every piece of trim on my HHR and it looks amazing (been about 2-3 months so far and looks like the day I did it. It also goes a long way, I'll be able to easily do my wife's car too and have plenty left over if/when I need to touch it up.
It's a tough sell to a customer because of the price unless they know how great it is, but personally I will never use another trim product on my cars again.