I am a happy chappy using Linux on my work box (laptop) for the past 7 years ... I dunno why you guyz are so fussy about that MS stuff ... 7 years, well not quite, I had a Mac for about a year or two ... Linux rules, as far as I am concerned. I am a tech writer ...
TBH, I used Windows 7 for about a month when it came with my HP laptop, however, the wifi would fail every time I unplugged the power cable ... Linux did not have that issue. Powershell is cool, however, cmd.exe is a waste of time and since you run Powershell in cmd.exe (AFAICS), you are fsck'd. OWA sucks, but it is less buggy than plain Outlook, if you ask me.
BTW, I always carry a livecd with me in case something goes wrong, to be able to work from that in case eg the hard drive fails, have not used it yet, but you never know ... beats ANY Windows alternative I could think of ...