I enjoyed the scenery because I'm from Northern Ireland.
I found the story line very implausible and contrived. I enjoyed the acting of PJ Keenan and his wife. The portrayed the level of hatred and disgust only found in that part of the world. Also enjoyed Dinger Bell, the farmer and shop woman.
Jimmy Nesbitt was a shadow of his role of Colin Howell in The Secret a few years ago.
Although Lorcan Cranitch was decent in his role, his southern accent let him down as time went on. Same goes for DS McGovern and DC Bird.
Word of advice for series 2 - get actors from Northern Ireland, rather than people trying in vain to mimic the accent.