Videotron is the worst of any major provider for their bandwitdh cap. At a whole 20gb a month (hard cap) they are really behind the times. They charge the highest setup fees in the industry.
They also have the most outdated systems of any of the major providers in North America to my knownledge.
Worst of any major provider in the industry? I don't think so! Their service is much faster than Rogers or Shaw, the other two major cable ISPs in Canada (see »/archive). They're way ahead in the implementation of their VoIP services. Stop reading the Toronto papers for a minute!
I acknowledge their hard caps are low and enforced (but at least they don't throttle BitTorrent) for the regular service, but their "extreme" service has no cap.