After having issues with the purchase of a case for my LG Voyager Phone, I was also in need of an screen cover for the phone.  I was told by the salesman at the Verizon Wireless store that is was not a good idea to put on a screen cover, as it would affect performance.  However, since installing the screen protector on my phone, this has not been the case.  The protector went on easily, and the phone works just as well as before putting on the screen cover.  Plus, the peace of mind I get from knowing the screen is protected is invaluable, especially for the $.01 price.  I would highly recommend this product.