The Apple one... I just nabbed an iPhone 4 at my Apple Store today (they had a HUGE amount in stock) but they were out of bumpers. I just placed an order for a Black Bumper on Apple.com and it should be here within 5-7 days. Just wondering if it's "worth the trouble" of hunting down a Bumper... Do you find it's bulky or stupid? Does it improve grip? Thanks.