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 have only had 2 360's. My first one RROD but that was my fault I put it in a very bad place with barley any ventilation. My current one is going strong, I've made sure to keep it in a vented area and download every game I play so the system generates less heat.