I don't know where to start! My drama friends have been trying to get me to watch this for awhile and I was hesitate when it was being broadcasted because I was watching too much drama. So finally I took the challenge of marathon watching this. Man, am I glad that I did. Let's start with the acting: Everyone did a fantastic job! From Lee Jin Wook as Sun Woo to Jeong Dong Hwan as Choi Jin Cheul! I loved the way everyone played their parts and held your attention whenever they were on the screen. Jo Yoon Hee as Min Young was simply charming. I have to point out that my favorite was Sun Woo's buddy played by Lee Seung Jun was amazing! His portrayal of Han Young Hoon was STELLAR! He amazed me with his expressions, his tears, his joy, just about everything. Music: I loved how you had a blend of every type of music from the 90's, whether it was western or korean; just about everyone was featured. I loved how the music fit the scene and helped, you the viewer feel what was going on in the scene. Action: AMAZING!! That's all I need to say!! Direction and Writing: This team of Director: Kim Byung-Soo and Writers: Song Jae-Jung, Kim Yoon-Joo; they must continue to work together. Studios? Just keep them together!! With this being their second work together (Queen InHyun's Man being the first), this is a team that no other can match!! Romance: We got real kisses, folks!! Big smack-a-roos and deep soul kisses! I have no complaints on the romance! No deer in the headlights for this drama. So is it worth 20 hours? Damn right!! Will you be bored? Most definitely not! The ending kind of left you open but what do you expect for time-travel where the cause and effects are definitely shown here brilliantly!! This is now my #1 favorite Fantasy drama!!