I’ve been using Apple’s mid-2011 MacBook Air for almost a week now and even though it’s physically the same unit that it replaced (for the most part) on the exterior, this is an entirely different beast. For starters, Apple’s second-generation MacBook Air improved greatly on the first model by offering up a redesigned case complete with two built-in USB ports, an SD card reader and SSD hard drives as the only available options. The older Intel Core 2 Duo processors however, severely limited the computer. It was functional enough for me to replace a Core i7 MacBook Pro, but it was slow; normal tasks would bog the system down, and the computer would heat up at the drop of a dime. All this has changed with the latest MacBook Air, however. Read on for my thoughts.