l have tryed the fellows brand screen protector, on my 770. I did not like them at all for multiple reasons:

• very diffacult to apply without bubbles , i think it has something todo with the adhesive being to strong
• you have to trim the plastic in hieght and width
• once on it is very hard to remove, i thought i was going to damage the screen
• the plastic is very thick and has a rough texture making stylus use very difficult

After i gave up on the fellowes screen protectors, i went and got a pelican psp protector. I can not even tell it is on the screen. no bubbles, easy stylus movement, and fairly easy application.