I thought I could get by without the course too, but after having taken the course...Its totally worth it! Altho I was riding ok, the instructors watch very closely and got me out of a few bad habits. Things I still keep in mind when I'm on the road today.
Just the other day I was heading to work going down the 401 with seemingly good traffic flow when I had to do an emergency braking stop to not rear end a car and go flying over it. Also my insurance company Meloche Monnex DID ask if I had the certificate for a small discount.

TAKE THE COURSE...might save your life one day.