A silicone case chewed your phone?? Never ever had any issues with a commuter. Defender hurt one of my phones, but there is no way a commuter will chew a phone. I mean it's inner lining is rubberized and just like many other cases made by big time brands that don't chew through phones.
Anyone who is curious, the only issue with the commuter is the open cutout to show the apple logo which can leads to scratches, but is standard on these cases, and the misaligned port covering for the earbud port. Otherwise, it's a solid case and I'm fond of it. I still tend to have 3-4 cases for each iphone lol.