The top inside screw hole doesn't do much good on the front or the back mud guards. In fact they affect the fit on the rear ones so I left that screw out on the front and rear mud guards. I added a screw between the middle and the bottom screw holes on the rear mud guards. Overall a good fit and easy install.
Install Time: 1-2 hours
Appears to be of good quality. The fit was good. I would suggest that they add an extra 2 screws to have a firm fit. The factory screws are too short and cannot be reused on My Ford F350 SD. Overall I'm happy with my purchase.