Received my replacements a week ago, and it was a breeze to change them as long as you followed the instructions closely.
My originals didn't stick too much, but the new ones definitely operate easier.
A friends young 18 month old has managed to get himself locked inside their RV due to this lock issue, and the trailer had to be broken into both times. Upon inspecting their FIC door latch parts, not only has the cylinder failed, but the deadbolt linkage has sheared off the end of the lock cylinder housing.
2009 Salem PT 403FB
2005 Ford XLT Supercrew