I just recently got a new MacBook Pro 13" with Retina and will only be using official Magsafe 2 chargers. I'm just curious as to what other people have experienced with knockoff MacBook Chargers. On my old White MacBool (Mid-2010 Unibody), since I was too lazy to move my charger around, I bought two knockoff ones. Two for home (one in garage by my desk and one by my bed in the house) and used the genuine one at work. One of the knockoff chargers would always get SUPER hot and I noticed a decreased battery life on my MacBook. The second one got slightly hot but did not heat my MacBook. When I sold my White MacBook, I realized a day later that I had accidentally sold it with the knockoff charger that makes it super hot . Oops! They hardly gave me any money for it anways. . What are your experiences? Or have you mostly stayed away from the cheap knock offs?