Back in December I installed and reviewed the same screen protector for the Galaxy Nexus and went on the use that screen protector for the following 7 months. Upon hearing SGP would remake this shield for the S3, I knew I wanted to check it out right away! A full coverage screenshield is one that covers the whole glass display, in the case of the S3, its slight curvature means some protectors can't cover the curved areas.
Visually, this screen protector won't provide the best clarity or feel, but where it excels is protection. A little thicker than most, the Flex HD provides unparalleled protection from drops and scratches.
Check out the video below for the installation (very easy!) and review: