I very much enjoyed seasons 1 and 2 - another "cozy" mystery series, gorgeously filmed and well-acted. The mysteries themselves are self-contained from episode to episode, while character development story arcs take place in the background to tie things together. As other reviewers have noted, the writers have made hero Sidney Chambers remarkably liberal and modern in his views. Perhaps in 1953 there were small-town vicars with such attitudes, but after a while it feels unrealistic.
For whatever reason, season 3 fell flat for me, to the extent I thought they might have changed writers. Perhaps it's the peaking of a couple of those story arcs in season 2, but I found that I no longer cared very much about the characters, while the mysteries began to feel secondary to the characters' stories. I'm unlikely to come back for season 4.
