So I got an Otterbox Commuter for my 4S a little less than a month ago, the glacier one. I bought it on otterbox.com, so I know it's a real one. But in the three weeks or so, it's already got two cracks in it and the bottom left piece broke off, not to mention the white silicone has gotten very dirty. I called customer service and they're sending me another one, but I just feel like it's really cheap and doesn't even provide much protection for my iPhone. What are other Commuter owners' opinions?