Other than noise? I don't mind the noise - the fans on the new MBP are relatively quiet and I can't hear them even at maximum speed when I play music. But I always get this bad feeling that the computer is straining itself and that dust is getting acumulated faster and stuff like that. But when the fans are silent, they are still working at around 2000rpm, so it's not like they are standing still. My question is - do you have an issue when fans are working for a long time - like, when you're doing something intensive? For example, when I work in Zbrush, the fans work almost constantly, and if I work 5 hours in Zbrush, that means the fans are hard at work, 3-4k rpm for 5 hours. So, is that something that should bother me? Of course, I don't have a choice and it never broke my old MBP. Also, my old Cintiq Companion almost constantly had audible fans working at high speeds, even when idling - and it was designed that way, so I'm guessing it's ok. Thoughts? Thanks.