I like a lot about this series.
They got the actual detectives from the cases to talk through the investigations. I felt this gave the show a weightier impact than had a narrator presented everything.
The tone was very professional -- cases were neither sensationalized nor presented as entertainment. It's tricky to get the tone just right with a show like this, but they did.
The reenactments were appropriately presented and well-acted. Some similar shows would overdo it on the suspense and try to turn everything into a horror movie. This show resisted that temptation and merely stuck to what I assume are the facts.
I would love it if CBC produced more seasons. I raced through the first three seasons in less than a week.
