Here is my opinion on it. But, its kind of biased because I have only used 1 case so far.. The zagg screen protector covers a good portion of the screen. but when I install my Otterbox commuter case. The edges of the protector ( mainly in the corners ) raise up. making the protector basically unusable with the otterbox commuter. I'm debating on trimming back the corners just a bit to keep them from being raised again when I put the case back on.