This series has a strong start and a good benchmark, the plot is full of twists, especially for the main characters. Most of them are believable, although some are a little too soft for their roles (e.g. Tommy's wife); the brothers, Jakob and Adam, are depicted by real brothers Sebastian and Andreas Jessen, but they do not belong to the TOP20 or so of the Danish actors...
The main story is about power struggles between different people - men and women, friends, and the police. The plot is set up well in terms of the number of episodes and it's not hard to follow. It's easy to get into and enjoyable, especially if you've watched other Nordic crime shows. However, there are some problems. There are too many slow, close-up shots and long pauses that don't add anything to the story.
The script could be sharper, and the characters often struggle to answer simple questions, which becomes frustrating after a while.
The second half of the Series isn't as strong. After a solid first few episodes, the plot becomes confusing and hard to follow. The ending feels somewhat unclear and disappointing. It might be left open on purpose, possibly to set up the Season 2, which has not been accomplished.
All in all, definitely no waste of time, but Denmark has created dozens of more fascinating crime series.