I liked this one! It's different, intriguing, and on the whole pretty good fun.
The acting, cinematography, and pacing are all solid and make for an enjoyable whodunnit thriller experience.
The murder mystery is, for the most part, very well executed and fun to guess along with and is balanced quite well with the romance elements.
The characters are largely well-written and feel fully fleshed-out and three dimensional. My personal favourites are Sorawit and That, my beloved itty bitty gay sleuths, but the rest of the cast is, if not likeable, then at least interesting and compelling to watch as well.

This show isn't perfect by any means; in keeping with classic crime drama tradition it is more concerned with aesthetics and style, as well as making the viewers *feel* something rather than with telling an entirely logical and coherent story.
This to say there are several plot holes (although how bothersome these are is entirely subjective) and the story side-lines character development and gets a little too wrapped up in its own twisting, turning mystery for my personal taste towards the end.
I also wish there had been more plot-relevant female characters who don't wind up dead or otherwise disposed of, but for what it's worth the women of this story all get plenty of screen-time and agency, which sadly isn't a given in many male-centric queer media, or even in crime dramas for that matter.

All in all though, Manner of Death, despite its shortcomings, represents a step in a new direction for the genre and likely helped pave the way for later shows to deviate even further from well-established tropes and plots and for that alone I appreciate it greatly.
So if you're interested in watching a little piece of queer film history, or are looking for a well-paced thriller that is neither afraid of exploring some very dark topics nor of casually incorporating queerness into its characters and plots, then you should definitely give this show a try.