Has anyone installed one of these? Is it helpful? Is it a problem? Does it restrict your view?

 

I had a set sitting for my truck, but I didn't like it when I held it in place. They didn't block any view, but just didn't look as nice as I had hoped.

 

I agree I had one ordered when I had my 95 F150. It looks much better in the picture when you order. The covering was VERY cheap and would wear off fast IMO. It didn't block any views. As for helpful you would have to pay attention to what you had up there so you don't have issues with sudden moves or stopping/starting.