So I noticed something interesting today. I just installed the InvisibleShield and have been noticing a decent drop of the sound quality on my MacBook Air. The difference is pretty big - sounds like the difference between Stereo and Mono for example. I've had Moshi since I got my MBA and only just installed the InvisibleShield recently. I didn't notice a significant drop in sound quality with Moshi but with these two protectors together...I must say I'm surprised hah. I tried taking out the Moshi keyboard cover and the sound became significantly better. I'm wondering. When I just had the Moshi cover, the sound resonated outwards so there wasn't any noticeable change in the sound quality. However now that the entire MBA is wrapped with InvisibleShield, the sound resonance has no where to escape, so it's centering to the keyboard area, and hence I notice a significant improvement when I take out the cover. This is my theory at least. Anyway, it's interesting. Maybe I'll get used to this or take out the Moshi keyboard cover after all if I can't bear the sound quality.