I always wait until a drama has all the episodes available, but when reading all the comments about how good this show was, I was almost certain to be disappointed. But it was just as good as all the comments I read. Yoo Yeon Seok as Sa Eon and Chae Soo Bin as Hui Ju were excellent. I hated him at the beginning, as I was meant to, but once a couple of layers of the mystery were revealed, I loved the character. Chae Soo Bin doesn't have much facial expression (perfect for I Am Not a Robot), and that also gave me pause, but they were both perfect in their roles.

This is the first drama I've watched in a while that I did not fast forward through any of it. I was able to just enjoy it for what it was and not pick apart any logic or lack thereof. I looked forward to each episode, anxious to see what was going to happen next.

I have to say, I didn't care for the casting (or maybe it was the acting) of the SML. He had an odd look about him and I couldn't get past the feeling that he was a bad guy. Also, I felt that the role of In A, Hui Ju's sister, was miscast. She seemed entirely too old, more like her mother.

I don't give out a bunch of 10 ratings, but this probably would have been one of them, if it weren't for Episode 12. What the heck?!?! I couldn't suspend disbelief that far. Did they give a third string writer a chance to write the last episode? It had nothing to do with the rest of the show, was sloppy, and irritated me. If the main couple had managed to get together in episode 11, I'd just tell people to skip episode 12!