I have to say that I'm really enjoying Amazon Prime Video, and it appears that Amazon has really stepped up their game in Canada. I find myself watching it almost as much as Netflix now.
Also, the number of supported devices has really increased in the last year, with even my Panasonic 4K getting an update to support it in the last few months. Granted, I don't stream it using the player, preferring to stick with either Fire TV, Roku, or Apple TV, which all have vastly superior interfaces to the Panasonic.
The free shipping and speedy delivery are nice perks.