As you can see in the video there was no need to use the wipers (for demonstration purposes, I would recommend you use them). You can also see when on coming traffic (white car 0:22) splashes water onto the windshield, the water repels quickly, giving you enough time to react. Having this glass treatment on your vehicle will increase visibility and reduced night-time glare during wet weather. It's also easier to keep the glass clean from mud, snow, sleet, ice and bugs.