been too busy to install but looks like remove head liner and it bolts to the windshield plate with longer bolts supplied in the kit, looks like installing the bolts is the hard part really, might need a second person to hold the windshield for a second, then cut a small section out of the liner for the brackets that hold the visor .
Purchased one on amazon for $50 less than the polaris , and this thing is really solid and built well.
YOU DO NOT NEED TO CUT YOUR HEADLINER!
Remove all the fasteners/screws from the headliner including the mirror and the dome light. Then slide the entire headliner back without removing it. Install the sun visors , then replace the Headliner and line up the holes with a little pressure.
I have the Polaris sun visors and they weren't to bad to install. Had an issue with one of them out of the box. It didn't "hold" well enough so it flopped a little. i was able to fix the issue with a little epoxy.
After I had the Polaris ones installed then I saw DRT is now making some and theirs are tinted see through. Not sure which is better but at least you have options. I would probably have chosen the DRT if I didn't already have the OEM.