I started watching Big Brother Canada during season 4 (shoutout to ASAP Science) and I was hooked ever since! In my opinion, the BBCAN seasons are better than some of the recent BBUS seasons (and I'm American). There's more diversity in the casting, they are there to play the game, their production value is great, and they have some fun in the house with their secret missions. Also, there have been several memorable moments and iconic houseguests throughout the six seasons.
However, one thing that distinguishes BBCAN from BBUS is their triple evictions, which are notorious for screwing people over, along with Canada's save. In addition to that, I hear the live feeds aren't good and they often don't work. They're also free, so that explains that. BBCAN can never 100% fully match up to BBUS considering BBUS has been around a lot longer.
Overall, Big Brother Canada is simply amazing! I highly recommend it to any fans of the American version. They may have the same format, but the Canadians manage to make it their own.