My iphone 4 has been dropped when my 10 year old son played with. There is a small fracture on the back of the phone. Nothing too serious but ultimately the piece of tape that I have applied is far from elegant but effective. I have already bought protection in the Apple store, transparent at the back, but the thickness of the tape makes it unusable. So this new silicone protection that is not too tight is perfect. It covers both the back of my phone. I can restore my iphone 4 to my son in the queues! The downside, I have to charge my phone with the cable directly without the docking.
For the protective film from the screen, I asked carefree. Although the look is different because the screen is now cleared and no longer mirror as before. But the effectiveness of the swipe is the same and everything works fine. It prevents the fingerprints on the original screen (mirror).
Of course, any protection mask the elegant design of the iPhone, but to protect it for me, I'm not complaining, and my son loves the games and does not mind waiting for me when I do a little shopping!