I know it sounds like a loaded question, but I honestly believe it is. I type this from my 2009 Mac Pro which was recently firmware flashed to 5.1 firmware and then upgraded from an 8 core 2.26 to a 12 core 2.9Ghz behemoth - so it's pretty much equivalent to a 2012 model spec wise. I use it primarily for writing music using Logic, but also for Photoshop and occasional video editing and it's never been anything other than totally dependable for me - so much so that I don't even think about it, I just use it - perfect! Now this would be impressive regardless, but when you consider it's a 6 year old machine now, I think it shows just how good these towers were to begin with and how great their design was. I've loaded it with 4 internal hard drives plus an SSD via a PCIe card, a blu ray writer and CD/DVD writer too and 24GB RAM and this 6 year old machine hasn't even broken a sweat really. For that reason these have to be the best Macs that Apple have made to date IMO, capable of running every OS from 10.6 to 10.10 and with the flexibility to grow with you (like mine has) and they still don't struggle to run any modern software either - not bad for an 'old' Mac! The way things are at the moment I wouldn't be surprised if it lasted another 6 years too. A real shame they killed it off.