I have the otter box on a 3gs. At first it was really hard getting in and out but now it's a breeze. Don't know why guess the stickiness wore off. All I can say is I had my phone along with a friends phone in the cup holder of a boat as I was going out the inlet. It was 6-8 but it's a 35 marlago. We ended up plowing one of the waves and got soaked. I looked down after we cleared the inlet and the cup holder was half full of water. My iPhone survived hers didn't! I don't know what hers was called but it looked like a "tough" case.