Also, Canon refurbs aren't necessarily returns of defective or demo units; they can be units that failed some QC check during the actual manufacturing process, and were deemed feasible to adjust to factory specifications (i.e., you could very well have a brand new camera that just took a minor adjustment to make it through the process of being built).
Sorry, but if a camera doesn't pass a QC test during production, it is sent to rework, repaired, and sold as a new camera (which it is). This is the case with Cameras, TV sets, automobiles, airplanes, satellites, ... virtually everything.
Even food is reworked and sold as new and is only sometimes marked as reprocessed.
Canon has a refurb facility in the USA which does testing and repacking. You should get a camera in very nice condition, but the battery will be used, and the manuals likely also used. I've bought a few and they were excellent cameras and never had a problem, but they were not new.