I’m not a fan as it’s a hydrophobic silicone polymer and I have found that even years later that silicone is left and very hard to remove to paint and stickers won't stick and adhesive won’t adhere. I avoid it sorry.
If you have a car whos windshield wipers don't work so well ( read old Volkswagen) it's great stuff especially when road racing and at speed the wiper actually lifts off the windshield. If you use it on a street car and end up needing to use the wipers once it wears a little bit, the resulting smear is worse than if you never used it in the first place. Once you use it, you gotta keep using it or clean it off the window with various wax and grease removers.
There is a foot step in the bumper. I hate the thought of foot slipping out of it and my face sliding all the way down the front of the van though. Lol
I am not keen on applying rainx directly to the windshield. However I absolutely love using rainx windshield washer fluid in both my PM and everyday car. It appears to put a tiny amount of the "active ingredient" on every time the washer is activated.
My first Mississippi monsoon rain storm had me on the shoulder of the road stopped and the next monsoon rain storm with rainx made me a believer. I got tired of the wax on wax off routine now I just use the windshield fluid.
Another vote here for the RainX washer fluid. Easy to use, and refreshes the coating every time you spritz the windshield. Out here in the eastern WA desert I seldom need to use the wipers through the year, but do use them frequently to clear the dust. Then when it comes time to need it, the RainX works just fine, mostly at highway speeds of course.
I've used the washer fluid for years on all my vehicles. I love it. Most of the cars and trucks I've owned, I didn't need to use the wipers in heavy rain at highways speed. The water just rolled off. It's great.
I use it occasionally and always the washer fluid, big fan of there wipers too. Living in the very rainy NW and driving a lot it works well, bonus is at night greatly reduces glare from street lights and oncoming vehicles.