I watched 2.5 episodes before totally giving up this series.
What I didn't like:
- one dimensional characters. Cha Soo-Young is clumsy and with low self esteem but hey, she has a special ability. Hwang Hwa-Young job is to look serious and ignore orders. There is a team member whose job is to scream at Cha Soo-Young or tell her to shut up.
- the dialogue feels rushed. [Spoiler for ep 2] "Oh the soil is wet, the sewage will collapse soon." this foreshadowing was needed 2 minutes later. It was delivered and used badly. (Also, why didn't Hwang Hwa-Young enter the sewage? I think, she has a slender figure as well and could fit)
- bad characters dynamic. The whole team is disfunctional, they don't communicate properly, they don't cooperate etc etc. I would not feel safe knowing there is a detective/police team like that in my city.

Overall really bad production, made it difficult to watch.

What I did like:
- using mute characters and showing sign language. It was nice to see this kind of diversity and I really enjoyed the dialogue between Cha Soo-Young and her father.
- Oh Hyun-Jae being severely incapacitated after being in a huge explosion. Way too many times I saw characters walking away from severe accidents with minimum of injuries. I liked the setup for this character and was really curious how he continues life with his injuries and how he will help solve cases (unfortunately it was by having a superiority complex and knowing everything)

Overall the idea and setup had a lot of potential to be something really good, but the script and production are lacking and ruining the experience.

Anyway, even if you care for these kind of details or not, give it a try, it might be what you need.