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've went through 3 since release and my first one broke and couldn't be fixed so switched to the Nintendo Wii for a while then got myself a Xbox 360 again after while other members of my family got another Xbox360 and after a year or 2 my xbox broke and it was sent off to be fixed so I stole the other xbox off family as they weren't using it at all so stayed on that until my one got sent back. Soon after it arrived back my family one gave out and now its just sitting in the spare room collecting dust. so I've had one Arcade and 2 Elites over my time of the Xbox 360.