I don't dispute the benefit at all. I took my chances, but I also tinker quite a bit. I've added a new CPU, two different GPUs and RAM kits, all the drives, various PCI cards and optical drives since I bought it. I figure if something goes wrong, I can fix it myself. I've taken what I think are good precautions to keep it in top condition. I have two UPS units in front of the system to keep it all happy, and I clean it enough that there's never more than the finest of dust layers inside.My mac pro has had NO problems whatsoever for the entire life of its warranty. It is a Mac Pro 3,1 2008 model. Applecare will expire in 5 days. It started shutting down after a few minutes of use today! I took it in and they are going to run tests and possibly replace the power supply and the graphics card. Would have been about $800 if I didn't buy applecare. Damn good thing to have!!
Time will tell if it was a foolish gamble or not.