There do not seem to be many posts here regarding the Air 13" accessories. The iCarbons look pretty cool but I am mostly familiar with Power Support. Was curious if anyone used any of the products: 1. Anti-glare film 2. MacBook Air Air Jacket 3. Trackpad Film Set 4. Protection Pack http://www.powersupportusa.com/accessories/macbook-air-13.html Useful or overkill?