I use Nikon DSLRs, but Canon has always gone above and beyond in the customer service department in my experience. I had some issues a while back with a refurbed multifunction that I bought from Newegg, but they ultimately made it right, and replaced it with an even nicer printer. To be fair, I think the problem was Newegg's fault, rather than Canon's.
As a result, I'm a loyal Canon customer, at least as far as inkjet printers and point and shoot digital cameras are concerned.
Here's another example of Canon taking care of its customers.