Here are my experiences with returning stuff to Canadian Tire.
Last month I returned 2 burnt out sylvania Xtravision bulbs, they were just under the 1 year warranty (I did keep the receipt). I had asked for an exchange but the customer service girl told me to take the refund then buy them again that way the "warranty" starts over.
Returned two screwdrivers that were damaged. Both were easily 10+ years old, one was a flat blade which was used to pry on something so the tip was broken, the other was a torx and the head was messed up because I used it on a hex bolt. I was more interested to see what they would do and was fully okay if they told me to take a hike. To my surprise I was told to go get 2 new ones.
I buy lots of Canadian tire tools for home use as they arent used too often. I find they do the job and when on sale they are a good deal. For work I use good stuff, Wiha, Wera, Knipex, Fluke etc. but thats because they are used daily.