I'd say never buy a first generation Apple product: it costs more, it's incompatible with current tech, it has unnecessary limitations (only 1 USB port on first MacBook Air and current MacBook, no 3G on first iPhone, etc) and it's untested so will probably fail a lot more (first retina MBPs had lots of display issues). The 2nd or 3rd gen will be cheaper, better tested, and by then the tech will have become more widespread and compatible. But for this to happen, the 1st gen has to come out, people have to buy it, etc... Just don't be those people.