I just went through a experience with my Canon products.
Three weeks ago my friends and I were in Yosemite valley doing a photo shoot and we were watching for the weather to change to get the photos of horsetail fall on glacier peak, there is only two or three days in February when the sun is in the correct position to get the effect of Horsetail fall looking like fire falls.
Well doing the process when I was moving my tri-pod around some how the quick release -released and I dropped my 5dMark11 and 70-200 2.8 lens on the pavement. Needless to say things didn't look good, housing on lens bent.
Called Canon and got approval for repair return and overnighted lens, had quote for repair next day and had repaired lens back to me within four working days. Cost of $177.00 for the replacement of housing.
One thing for sure you can't have better service than that from any service center, so again that is why I like my Canon products. Also I have replaced the tri-pod ball head mount with a BENRO B series w/acer-swiss plates.
PS: Sun never showed up for photo shoot on the falls, O well s-happens.