I'll start this off by saying that this is the 1st drama I watched after a MAJOR drama-slump so my very high rating is based more off of my enjoyment watching than any rational reasons like amazing plot or award-worthy acting.
I don't know what it is about C-dramas, but I accept their corniness and over the top acting more so than any others. It's like they're in on the joke with the viewers, so its ok by me. The story overall has a lot going on! There is LITERALLY something for everyone: Romance, friendship, action, fantasy, ALL the different time periods, vampires, werewolves, magicians... just to name a few. But the overall story is about a master and his disciples who time-travel into a person's past-life to fix a problem they are having in the present. It's a nice plot that introduces all sorts of mayhem and time jumping, and every time its a different story. So if you don't like the time period and plot in episodes 4-7, then maybe the plot and historic period in episodes 8-10 will do it for you. The common thread through it all is Ye Yin's meetings with past-lives of the people she knows and one very clingy vampire she keeps running in to. The awkwardness, the cuteness and pure comedy that follows will make you stick around just to see what happens next and how Ye Yin will get out of the problems she started in the 1st place!
Even though this doesn't have a romance tag (as of right now) there is some romance. An eternal love triangle to be exact. There are hints that there is some huge history between the two main men in Ye Yin's life, but we only get flashes here and there (probably saving it for season 2!)
The acting was over the top, and corny... but it fit the tone of the show and had me LOLing the entire series.
Like I said before, I was in a certain mood to really enjoy this series. So I understand that it may not be for everyone. But for getting me out of my drama slump, making me look forward to a 2nd season, and forcing me to watch some episodes RAW (bc I just couldn't wait for subs) this was near perfection IMHO.