I had no idea what this was when I started the show. Despite part of this being hard to watch - it's very well done. This is the true story of horrific crimes, but I give the series credit for showing the crimes in a respectful way. There is not much gratuitous violence - most of what we see of the crimes comes from the profiler and her reactions to them. We also see what happens to a person when they are exposed to so much violence. Nobody can see terrible things every day without consequences.
The landscape of South Africa looks incredible, and it's a stark contrast to the crimes committed. The acting is great - Charlotte Hope is amazing. The direction is good. It's a bit slow, but appropriate for its subject matter. You can tell it's based in the 90s - they caught that vibe perfectly.
Give it a watch - it's a bit sad, but a very good series.