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 got the original 360 when it came out and it eventually couldn't read the hard drive so around 2010 I switched to the Slim and haven't had any issues.