The first 10 episodes of this drama were gold, and it had excellent production value and great casting. This drama packed a lot of amazing, meta-mind-blowing, thought provoking questions about destiny and free will in the first half of the drama. The last couple episodes failed to wow me, as I felt they lost a bit of that anticipation and felt predictable in comparison with the first half. I was content with the end, but I will mourn what could have been.

[spoiler] Kang 1.0 was visibly and narratively different from Kang 2.0 in the later half. And although I found the more grounded, nuanced Kang 2.0 a more reasonable - and well- human-like version, as was intended, but there was an unarguable charm and zippy flavour to Kang 1.0 as a manwha character. I was impressed by Lee Jong-suk's ability to play two very different versions of the same character, but I was disappointed that there wasn't more inner conflict on the side of Oh Yeon-joo that persisted and shaped her relationship with Kang 2.0 over the obvious loss of the relationship with the 1.0 version. [/spoiler]

[spoiler] Ultimately, I had hoped that they would have allowed Kang 2.0 to truly reclaim his own destiny and fate, and completely step outside the confines of the manwha. And I will probably always wonder what happened to Seo Do-Yoon, living in a continuing manwha without a main character, story or defined end. Is the world within W now completely free from it's own pre-determination as a story without a writer? We will never know. [/spoiler]