I consider this a 'performance' Topic because the factory design of the windows SUCKS...
Even if you only open the front window a crack at the top, the front edge allows water to enter the vehicle and promptly soak the inside of the door.
It'* a stupid design flaw.
The rear windows can only be opened about 1/2" at the top before the leading edge opens and allows water to enter.
Living the Rain Capitol of the World makes driving with the windows up all winter long a real bitch. There has to be some airflow to unfog the windows.
I've been looking at the VentShade products and pictures of some of the Bonnevilles that others have posted and realized that product does not adequately address the design flaw.
The WeatherTech product MAY effectively overcome this problem, but, I won't know for sure unless someone here has used that product and can report on it, or until the folks at WeatherTech contact me back via e-mail.
I sent them the information regarding this problem and requested that they let me know if their product will solve it, or if they'd be willing to design one that did.
I'll report back on what they say.
In the meantime, if one or more of you has used the visors from WeatherTech, please post your information.