>TKEM is a complete package; was supposed to have the best of everything: the most successful screenwriter and director, extremely popular actors in an ensemble cast and a lot of money being into production. But it does fails to keep us enterntained every week. There are some ups and downs with series ; especially since this is first time I'm watching a korean show weekly ; midway i was dropped the series until all the episodes are available on 11-12 June.

Pros:
1. AMAZING CINEMATOGRAPHY: Everything is beautiful.
2. Lee Min Ho in all his KINGLY glory. First time i liked him in his character as this suits him better than the other roles.
3. Woo Do Whan in his double role is extremely convincing and is the best part of the show.
4. Most of the actors in this large cast have done a really good job.
5. Interesting concept of parallel worlds and [spoiler]time travel.[/spoiler]
6.Lee Jong In - I like how upright and protective he is to the KING.

Cons:
1. Very annoying FL. I do not like her. I'm disappointed with Kim Go Eun's portrayal of Tae-Eul. The character herself isn't very likable either. The way they styled her is also drab and disappointing considering the contrast with the King who is always looking regal.
2. No chemistry between the leads. I tried to convince myself that they look good together for a very long time but I'm finally giving up. Their romance is really boring, no fun moments.
3. The plot is a mess. There are too many characters and none of them is able to make a meaningful impact because its not coherently put together.
4. Kang Shin Jae is given a lot of importance in the plot, but the actor doesn't have equivalent screen presence to pull it off.
5. SO MUCH PPL, the characters not only use the products but also TALK ABOUT THEM. I never complain about PPL but honestly in this drama its very distracting and really pulls you out of the story.
6. The world building is off, Kingdom of Corea looks almost like and Republic of Korea and its hard to tell the difference unless its the palace setting.
7. The suspense is not built up properly cause often the audience already knows what's going on while detectives on the show try to catch up. [spoiler] I don't even remember what the detectives were investigating with the murders until they found a clue of otherworld [/spoiler]

Overall this show might have disappointed many people ; I love most of these actors but unfortunately their characters are so bland that they can't do any magic here.
As for the aesthetic, it is really enjoyable and pleasing to the eyes.. ; all korean shows in last 2-3 yrs partnered with Netflix have high production value and good visuals like Mr.Sunshine , Hotel Del Luna , CrashLandingOnYou;

Ending spoiler below - caution
[spoiler]
The ending is Quite similar to CLOY ; unlike there here they meet every week and show us they grow old together ; very unrealistic for king to have a queen out of limelight in a different world. Its illogical that Tae-ul survive out of the gate crash but yeah as shown the kid let her have memories ; but don't understand how the memories of KING are oriented after surviving and rewriting history ....I did though like the part where all the people who got their sad pasts ; messed by Lee Rim got corrected
[/spoiler]

All in all this a better show with hypotherical modern Korean KING and does most bits ok ; definetely disappointed many with the expectations set initially.