Missing parts - one washer was missing. Luckily I had one on hand.
Poor fitment - I had to take a hacksaw and cut a bevel into the left slider, as otherwise it contacted the frame before the mounting bolt was bottomed out.
Poor design - My right shin contacts the right slider when I'm seated on the bike. It's not obnoxious, but it's there.
I got these Protek sliders at a major discount. If I had paid full price these would have gone back to Dennis Kirk, and I would have demanded my return shipping be paid. These are nice quality but nowhere near worth full price, and the poor fitment and design are inexcusable.