Reign is one of my favourite TV shows. The actors are all talented (Especially the acting of Megan Follows - who played Catherine de Medici - is breathtaking), and the plot never gets boring.
Nevertheless, i have to admit that the ending part (the last episode) was rather disappointing. It feels like the show unexpectedly ended all of sudden. I believe there are more stories to be discussed.
Besides, it is very sad that NO ONE became happy in the end. I know the history itself was sad in real, but the imaginary characters (such as Bash, Leith, or Mary's Ladies-in-Wating) deserve more happiness at least.