De Dag is a 12-episode bank heist mystery drama (that unfolds over 24 hours, hence The Day) in which all odd episodes have the story from the police's perspective and the even ones from the criminal/hostage's perspective. To get everything that happened in a given time period, you'll have to watch two episodes. This format is used throughout the show and has been done so cleverly.
The acting was great. In a lot of scenes, the acting is done "off camera" and you only hear phone conversations, which can usually get boring, but they did a good job of making it sound interesting. The cinematography was really good. Great editing! Great music and sound effects as well.
While I really liked the method of storytelling, the writing faltered a bit, but I was okay with that because I wanted to know what was going on. Things unfolded on slowly, but I was okay with the pacing also. It's okay because it'll seem more realistic, unlike something outrageous that you're forced to believe and play along. There's nothing over the top and it feels like real-world police work.
This show is worth searching for the availability in your region, I wasn't let down at all, and I hope you won't be either.