Now that the iP4 and bumpers have been out for a while, I'm wondering about peoples experiences with them. Do the bumpers actually protect if you drop the phone? I'm the type that admits that I'm going to drop my phone about 4-5 times over its lifespan. $30 on a case is better than $200 for a new phone. Anyway, since I'm waiting for the white iP4 I'd like to know what peoples experiences with the bumpers have been.