Some questions for current 2013 Air owners... 1) Was anyone able to get Windows 7 working on this machine? There are several comments in this forum that suggest Win 7 isn't usable on the 2013 model... 2) In general, how is performance under Windows compared to a similarly spec'd non-Apple laptops? Do benchmarks suffer? Are drivers problematic? How's the battery life? 3) Is the Air truly a good Windows ultrabook? Google yields some totally conflicting reports.