I'm getting dizzy from all the spiraling mystery and plot twists.

PROS:
+ Very creative and intriguing story, where the protagonist can't really be trusted, yet he is likeable and you want him to succeed
+ Impressive acting performance from the lead cast
+ Nice, tension that builds to create a thrilling second half

CONS:
- There are probably too many plot twist reveals that cause a "cry wolf" effect and make many actions seem less believable/plausible
- Upon revealing the most significant plot twist, there is very little emotion expounded from that revelation
- While the latter half of the movie is thrilling from the "pursuit against time situation," the pacing is rapid and misses the mark to properly de-escalate and accept the weight of the happenings
- There is a questionable scene at the end that comes off as corny, due to the implications of yet another silly twist

Yes, I think this is worth watching. Especially if you are looking for a less conventional detective and serial killer movie. However, this is certainly a one-time watch that will sour if you think about it too much.

I would have been much more eager to recommend this, had the ending been done a little differently by adding some much needed emotional impact.