The Air Canada Signature Suite Vancouver is now open, and like its counterpart in Toronto is one of the best business class lounges in the world.
At the end of 2017 Air Canada unveiled their international business class Signature Suite lounge in Toronto. In my experience it is the best business class lounge in North America, and perhaps the best lounge in North America. Dining there is genuinely fantastic. It is open only to paid business class passengers on Air Canada, not to Star Alliance customers, award passengers, or upgrades.