Anyone use these? I'm definitely glad I got one and I'll definitely use it for traveling and flying. I've dealt with scratches in the past as a result of airport security carelessly handling my machine and kind of throwing it around in those plastic bins. I'm hoping the Moshi case will help protect against this. Anyway does anyone keep their case on all the time? There's no way the hard plastic interior of the case could scratch the aluminum? Normally, I would keep the case off and let the aluminum show but it's also nice to have the option of an alternative color scheme along with some added protection.