This is a very good series! And i would reccommend peopl to go watch it! However, i do have to say that my expectations weren't fully satisfied (but are they ever?) because i saw sooo many good things about this i kind of went in with very high expectations about the game aspect of the series.

Short version of Things I liked:
- Cinematography/Production
- Acting
- Music score
- Story

Cinematography/Production:
The production value is unlike any other series I've seen, with a lot of long shots that create 'calm scenes' that contribute to the world building and really help immerse the viewer, instead of advancing the plot.
I especially love/hate how alone they make Cha Yeon Woo look in all his solo shots. *sobs* it's so masterfully done that it made my heart ache everytime he was in that kind of scene, just utterly alone...
You could really see how every shot was taken with care and precision to make it really feel as if you're in a game that at the same time is not just a 2D simulation, but for the characters is very real.
The camerawork, lighting and directing was so great, it really made me feel a lot!
I can't believe that at the end when they reveal tae myun-ha's memories how alone he looks instead of cha yeon woo...the parallels??? insane. they really hurt me :,)

Acting: I think the cast was great at conveying the mood and emotions. it's been a while since i was really moved by a dramaseries...and oh brother...*sobs*
The small ensemble cast also did great. They really fit their charactertypes too
I only wish they'd given cha woong ki a different haircut.

Music score: I think this is also one of the things that can help immerse a viewer into the world. Not every scene needs background music to show what's happening! For me this was also part of the 'calm scenes' and world building.

Story:
The story is a classic Isekai story except with a modern setting of a videogame instead of a romance novel. Nevertheless, it was executed very well.
I believe they could've leaned in more to the existential crisis part because I think they could've pulled it off well but Isekais rarely do that so I don't really mind but there were a lot of unanswered questions. there's also the fact that there is mentally a large age gap between the two male leads. the ending did feel a bit rushed and too quickly resolved but alas, there were only 8 eps of runtime so i understand. the past life of tae myun-ha was a sudden twist.. i didnt mind it too much but i can see how it can bother some people and also from a storytelling perspective it doesnt really make sense so i did deduct some points for that. i kind of wish that we could've seen more of the video game world (how is it an exact 1-on-1 of tae myun-ha's life (complete with granny & mother)) and more NPC interactions would've been fun i think.