This is my fourth Moshi screen protector (2 iPads and 2 iPhones) and it's my favorite screen protector owned. Having had film like protectors, external covers, and glass these really are best of all worlds. First they don't break. Second they don't show fingerprints until you really need some cleaning :) Third they combat glare from sunlight, overhead lighting, et.al. You may have an issue with some cases on the newer iPhones that wraparound the edge of screen and prevent them from lying flat (they are a bit thicker than most screen protectors). Fourth they can quite successfully be removed in tact, cleaned and replaced on existing or new devices that they fit. Other than interference caused some cases in combination, I know of no drawbacks.