I've never actually compared them side by side to any of the brand name lights, but I have a couple sets of the 8" ProComps. I have been in & around lots of desert racing & chase/pre-run vehicles with spendy lighting options, so I do know what good lights are like & can do.
I needed more lighting on short notice b4 my first Baja 1000 trip and a friend had bought a truck that had a set of these on it. He didn't want them so he'd already taken them off. I built a built mount and wired them up.
They aren't going to win any races, but at the speeds I was willing to push the Sub down those roads they were exceptionally nice. The best part is the retail price and they come in
black,
chrome, or
stainless housings. In my use I have discovered two things that go wrong with them. The rivets at the adjuster work loose over time, and lights of this size usually need a top brace - these are no exception.
Courtesy of a friend I have some HID elements with req'd electronics that I am slowing grafting into a set of these lights. The one prototype out performs it's halogen twin by so much that there is no comparison.