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 technically on my fourth. But #3 (an original) is still running fine. I bought an S on Boxing Day so I wouldn't have to deal with an RROD since my original RROD warranty was up. 2 RRODs total. #1 overheated during a long ass game in Tiberium Wars. #2 blew up when playing COD4.