Just completed the installation of the 3-part carbon fiber skin from iCarbons on my 2012 13" MBA. Easy to do, looks awesome and is almost a perfect fit. I did not do the trackpad and Apple Logo (just a personal pref). Where the skin lost points was perhaps at the worst place. The top lid skin, when aligned with the Apple logo falls short by about 1 to 1.5 mm from the front hedge... See pics with arrows. Bottom Line: A $50 well invested IMO.