I have one that looks just like it (different brand) from DDMS that was like $1 or something. I used it in Kauai and found that it got in the way of the pictures coming out clear underwater. Then again, I somehow incredibly forgot I could use the volume buttons to take a picture, and instead kept pressing hard against my screen to get pictures. It's possible that if I wasn't messing around with it, the pictures would have come out clearer. I believe I saw somewhere that someone had the same case and had no issues with pictures underwater because they weren't so dunce-like.
