I have read several posts on CR from people that said they had experienced problems with the Canon Factory Service Center in Irvine, CA. Well, I don't believe it's just me, but I have never been anything but completely satisfied with the folks at Irvine. I've used them for over 16-years now and they never fail to amaze me with their excellent customer service, and professional product repair/clean & check procedures.
Although I live in Albuquerque, New Mexico, I make several trips out to the coast each year. The Canon Irvine facility is located just 20min. from where my Daughter lives, making it very convenient for me to drop my gear off and get it serviced while I enjoy the great California weather. Additionally, I save a bunch on shipping and insurance costs this way too!
On my trip out there last week, I needed to have my 1DX and 1D4 bodies cleaned and checked. The 1D4 also required adjustment, as it took a large amount of MFA (-10 to -16) on most of my telephoto lenses to attain sharp focus! I had never checked this fully, as I had a second 1D4 that I used almost exclusively and only used wide-angle lenses with this body. Although the body was obuiously in "as new" condition and the shutter actuation count was exactly 1,000, I was informed that there would be a service fee ($100+) for that body.
Lesson learned, always fully check new bodies thoroughly before the warrantee expires! Fortunately for me, after reviewing my CPS account and discussing the issue with CPS management, they performed the service at no charge. Additionally, they completed work on my bodies well ahead of the projected three-day turn around. They certainly didn't have to do all this for me, but they did! Just one more example where the Canon Irvine folks went above and beyond for one of their customers.