Canadian Tire and Walmart are not "real" bicycle shops as they do not offer service, any kind of fitting advice, and the quality of their bicycles and assembly is often suspect although not everything they carry is crap and the Schwinn branded bicycle tend to be of a better quality.

These are not the same as bike shop quality Schwinns as there are two levels of manufacture and quality marketed under Schwinn's name.

On the bright side the Schwinn seems to come with a Lifetime warranty and although this is not covered, I would make sure that the hub bearings are properly greased and adjusted, and that the headset and crank set are similarly greased and adjusted.

MEC offers service and their mechanics tend to be decent, to do the aforementioned jobs you are probably looking at an hour of shop time and a small amount of materials (grease).

I would also have the wheels checked to make sure they have been properly built and that they have been tensioned and de-stressed.

After that you should be able to enjoy the new bicycle for a good long time and then just take care of regular tune ups and any service it needs.