To be very honest this is a drama which you should go into without reading any reviews whatsoever, as this is a drama in which sometimes the villain is sympathetic or a straight-up bitch, the FL is either a sweet, naive girl or an annoying character.
I personally loved the show - the acting, the fights, the romance. Most of it due to JCW but the other FL and SFL also did a very nice job. To those who felt that Anna was annoying - she was supposed to be a naive girl , she was forced to be alone after a traumatic incident and if that doesn't make you a little weird, I dont know what does.
Reading reviews ruins your whole perception of the drama and will make you a little hesitant to watch it, but I will tell you to watch it, beacause this personally was one of the dramas that I loved.