Just received my free white bumper from apple. Put it on, while being very careful not to mess up the IS already on my phone. My first impression is the bumper made the edge of the phone more slippery. Within 10 minutes after I put the bumper on, I almost dropped my phone because of the slippery bumper. Happened again soon after that. Luckily this is free from apple. Now off goes the bumper and back to just IS.