I had 5% put on all the way around over top of the factory tint. 5% brow that is at least 8" but left the rest of the windshield at the stock tint level. Don't find myself ducking to see out (am 6' tall), except to see stoplights on dark days. It is really nice in the full sun, and is no problem at night except for backing up into dimly lit areas which is easily remedied by rolling down the side windows. I have a camper shell, so that makes it even darker in the back. Have had it on now for over 6 months, had it professionally done at a local window tint place that was highly recommended since I didn't have the time to do it myself. The guy used quality materials fully warrantied and was extremely meticulous about getting it perfect spent an entire day doing the whole truck also didn't charge an arm and a leg.