The story is concise and goes straight to the point. Which is both good and bad, good because it doesn't feel stretched and you don't get to be bored, bad I will cover below.
The shots are nice, most of the time you can feel immersed thanks to the camera work, it doesn't feel static.
The setting is good, it creates a gritty mood and that works great with the story that's being told.
My main problems with this show are:
The ending, which I don't think was thoroughly explained, even though I had watched this show in two sittings, so I don't feel like I forgot or missed much.
There were no fillers and sometimes it felt a bit rushed. We didn't get to know anyone on a personal level, apart from a few flashbacks for the main character.
And while we're at it - the all-knowing main character. It felt like every call she made, even by coincidence, was correct and pushed the story forward. There was not a lot of mystery solving, it felt like she was supposed to find clues and answers and she did that easily, without much thought.
Overall I believe it's worth giving it a shot. Are there any better, short shows? Sure, but I don't think you will have a bad time with the Thaw.