It is true that Kal Tire is a bit more expensive, but they provide warranty and free tire rotation.
So does Costco. Free flat repair, etc, etc. Customer service at Costco is excellent in my experience. As for the price difference, it was approx $300/set for the Nokians over the Blizzaks.
Bridgestone was offering a $100 rebate for tires purchased between certain dates. Costco had to order my tires, and couldn't process the purchase within the dates. They came through and offered me the price reduction internally, instead of through Bridgestone. Excellent.
My tire pressures are always set perfectly, and the TPMS is reset. I've never had a balance issue, including on some cars that were VERY picky about wheel balance.
They're a 10min drive from my home, I get an additional 2% cash back (Executive Member) and see no reasons at all to change.
Anytime I've talked to Kal Tire they've completely ignored anything I said and pushed tires I wasn't interested in at prices that nearly caused my heart to stop. A few years ago, I just stopped even calling/going there.