You're the sucker who has to live with it!.
Don't walk around your house barefoot unless you like walking on nails. I called them to come back and fix the needle-sharp nails sticking up along the tracks. Oh they came back but didn't fix anything. My daughter came running into the living room after I called her to catch something on my computer and a nail caught her foot and ripped a chunk off the bottom. Lancaster flooring kept saying something about Z-bar and this limits the nails. Either it doesn't work or the guys there don't know how to install it.