I've seen this 13" Speck Seethru Case which makes sense in terms of helping with avoiding scratches on MBP. I've question how it affects heat dissipation from the device ? Apple store itself sells this accesory so not sure if it harms system or helps. Also what is difference between Speck Seethru case and Speck Seethru Satin case ? Also what is best laptop pad to stop burning your legs after hour or two of MBP usage. I want something that is comfortable and small.