I've had one of these for my iPhone4 for about 2 years. The case has now about had it, but that's acceptable because it has done exactly what it is supposed to. What annoys me about this, is that two years later, the product is the same. The rubber flap that goes over the earpiece socket has a hole in it which is not aligned with the hole in the iPhone. So, to use the earpiece, you have to leave the rubber flap open. A bit disappointing that Otterbox haven't managed to sort this out really. Otherwise, it does what it is supposed to do and two years later, the iPhone still looks new.
Bought one of these for the iphone 4s, but beware there is a difference between iphone 4 and 4S cases, I belive its because apple moved the proximity sensor on the 4S but I've experienced no problems with it and prefer the 4case to the 4s as has more protection for the front facing camera.
One complaint, pretty expensive for a case so shop around.
Great phone case, if you need total protection, plastic screen covers the glass and hard plastic internal cover then outer skin.
Looks and feels very good quality.
The extra clip on cover also provides extra protection if required.
Great value, if you think what it will cost if you drop your iphone 4