I think the real "draw" for this series, at least for me, has been watching Mikael Persbrandt (Gunvald), whose skill is so good, he saves a weak plot line (accidentally encountering his partner after 10 years, with a 10 year old son who just happens to be Gunvald's, etc.). His boldness and style only hint at the character's past experience and training he has completed, even when his skills fall short tactically. Perhaps to emphasize his limitations, or just poor writing, Gunvald standing and pointing his gun as a car races towards him, is pointedly awkward, even a little amusing.
And, I may have missed the explanation, but I'm at a loss to explain why Beck's lonely neighbor has had to wear a neck brace for a decade.
The solid performances by all of the characters in every episode, and the intricacies of each storyline as it unfolds, make this series delightful to watch. While some episodes may seem a little dark, there isn't superfluous blood & gore or gratuitous violence. It is also great for those who want to see a captivating series that isn't steeped in profanity.