This is kind of a hard drama to rate. Why? Because even though it is a sageuk and it's 20 episodes, I wasn't ever bored but there were some aspects of the story that just could have been better. When it came to the acting, I must say the supporting cast out shined the main characters. Everyone from Im Seul Ong as the Crown Prince to little miss Kim Yoo Bin as Rang were stellar!! Will someone just give Song Jong Ho his own drama to be the lead already?!! I've been saying that since Princess's Man; repeated it for Reply 1997 and now Heaven's Order!! Enough is enough!! He was exciting to watch, funny and just carried every scene he was in; especially his back and forth with Kang Byul as Woo Young. Those two and their romance made the romance between Lee Dong Wook (Choi Won) and Song Ji Hyo (Da In) pale in comparison! I think everyone who watched cared more about their relationship and that's simply because of chemistry. Sung Woong as Do Moon simply stood out to me throughout the drama as Da In's father's henchman. You wanted to hate him but simply couldn't help but love him and his beautiful (and real) mane of glory! I will remember his name for now on. Overall, if you like the genre, it really is an easy drama to watch. Sure, the usual machinations of the royals and nobles but get past that, there are so many funny and fun moments to see and characters to fall in love with!!