I spewed fire at Windows 8 when it was announced and after installing the Consumer Preview/beta. Ran it till RTM came out and installed it the day it came out. Recently I realized I went days, probably a week or more, without seeing the Metro/tile start/interface at all.
The OS would suffer form bad app design though, it's already evident many app designers are phoning it in completely and there are other apps that are pretty cool
As for getting out of an app... Windows key on the keyboard to get out of apps or mouse in the top/bottom left corners
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