Should I Join, (or quit) a Union?

I'm Not a Union Guy, but it's OK if you are.

I’m Not a Union Guy, but it’s OK if you are.

Should I join a Union?

It’s one of the things that I get asked the most.  It’s also fairly politically charged question.  Should I join a Union (or find a Union job), or go it as an employee-at-will?  Am I better off without the Union?  Should I be shielded from that a-hole boss, or try to stand out for my exceptional skills?  I’ve got my own opinions, but they are biased–just like everyone else.  So, I searched out articles that give as un-biased an evaluation as I could find.  This article on Bankrate.com does a pretty good job of giving the pros and cons, in two pages.