I have an early 2014 MacBook Air 13 inch, it goes everywhere with me, transport it in a messenger type case, since the actual laptop case I have kinda went awol, and we have had some really cold temperatures in the Chicago area lately.... to the point the aluminum case of the air is so cold that it almost freezes fingers, and it has never missed a beat. Had to replace the battery this year, but that is expected being a 2014 model. NONE OF MY WINDOWS LAPTOPS EVER SURVIVED A YEAR BEING TRANSPORTED EVERYWHERE, like my MacBook Air has.