I got my 360 elite in 2007 and it only failed the day Mass Effect 2 came out (Crashed during gameplay) and due to the error being an E74 error I had it fixed for free and no problems since.
So in all I have had the 1st 360 I ever owned.
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I'm on #5 right now- after 4 RRODs. This one has lasted me since 2008, though it seems to be on its last legs.