I have the exact same case and the exact same problems. The dust in the case doesn't bother me all that much, but I'm not thrilled about the scratches that have developed. My BIGGEST beef with this is that since the case is plastic it slides all over the place. For example, when I have it sitting on my lap for just a few seconds on the train, it will usually slide right off my lap and onto the floor. I wish there was a non-slip surface to these.