They could be good, never seen them before. You may want to contact them and ask the spring rates, they could be too soft or too hard, compare them with eibach/sprint/tein/megan spring rates and search here on reviews of each brand, hope that helps.
As the old saying goes....You get what you pay for. In my happy little world when it comes to suspension components i will always pay a little more to get parts from a brand i know.
I can't slam the guys product since i don't know them. But the name Canuck Motorsports conjures up images of old George out back in his work shop winding springs by hand over a fire wearing his flannel jacket and toque.