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Re:Ask HN: Is OS X Lion worth it? by antoinevg on Tuesday December 27, 2011 @02:54PM (#3397122)
Don't get it if you have a newish MacbookPro. Battery life for many folk went from ~6hours to ~2hours:

  https://discussions.apple.com/thread/3194235
Re:Ask HN: Is OS X Lion worth it? by steventruong on Tuesday December 27, 2011 @07:51PM (#3398131)
I don't have that problem so it might not be affecting everyone.