I initially wanted to watch this show for Park Shin Hye, but I soon realized she'd be just a supporting character this time. However, I was hooked by the game concept, the story line and Hyun Bin's portrayal of the main character kept me glued to this show until the end.
One thing I have to criticize the writer is - again - the way she writes her female characters. This is something that ruined W for me, and in Memories of Alhambra made the romance feel forced and unnecessary. I couldn't help but sigh at the waste of Park Shin Hye's time for this show.
I still enjoyed it, however. I'd reccomend it for those who enjoys a drama packed with suspense and action, and that will leave you with questions after every episode, this might be for you.