I have a 2009 24" cinema display. There is a dead pixel and a slight smudge on the screen. Other than that, it is working totally fine. It does not bother me too much although it is noticeable in some color background. I am not sure whether those problem will get worse over time. How long does your display usually last? I am wondering if I should sell it before it gets too old. I don't know how long those display usually last. I have a 20" cinema display in the office that works perfectly for those years. But the 24" seems to have more LCD panel problems over the years. Just want to hear your opinion if I should sell it and upgrade to thunderbolt.