My preference only, but I've never understood why some people will park there car for extended periods of time and leave the windows / HTC / Targa top etc down?? I think some like to show off that their car is in fact a HTC, but the reasons I've never done this are mainly to keep the inside of the car clean of dust / dirt, free of bird droppings, protect the interior from UV rays, security, etc....Now here is another reason I will NEVER stop doing this.....