TV viewer ratings of the drama started with 3.4 percent (Nilson Korea) on July 29 and remain in the early 3 percent range as of June 6. There has been a critical analysis that there are no new characters or dramatic devices that can catch the attention of viewers until the fourth time that goes through the period of burning the topic. For this reason, there are voices that are concerned that the nightmare of Criminal Minds', which had to be sent out with 2% TV viewer ratings even after investing a total of 20 billion won in production costs, may be reproduced.
Dramas that put thrillers and rhetorical genres on the front are a tension by crossing the investigation of murders and Detectives. Nevertheless, it can not avoid the point that it is somewhat poor due to the repeated development of 'accident' in the play. The five-day broadcast scene is typical of Lee Joon-gi, who hangs on the veranda railing to avoid Moon Chae-won, who came in while searching the house of Seo Hyeon-woo, as the shadow disappears thanks to clouds that are accidentally cast over. This is also why some say that the Flower of Evil has not been competitive in the face of the recent pouring of investigative dramas that have increased expertise by using various advanced science and technology.
Detective characters, which lack reality somewhat, are also considered weaknesses. The Homicide Detective, Moon Chae-won, heads to the scene of the incident with a sophisticated fashion and a fully groomed hairstyle every time. The setting of Detective is a dissatisfied view that Moon Chae-won expressed somewhat away from Detective in reality, despite being a key factor that makes Lee Joon-gi doubt his identity. Some viewers also responded that they were "intrusive to immersion."
Lee Joon-gi and Moon Chae-won expressed their determination to erase the failure of Criminal Minds', saying, "I will 'second challenge' to genres with 'flower of evil', but I can not catch the opportunity to reverse the atmosphere. The performances of the supporting actors such as Seo Hyeon-woo, Moon Chae-won and one team, Detective Choi Young-jun, are noticeable. Seo Hyeon-woo is holding the drama with Lee Joon-gi and his comrades, and Choi Young-jun, who took a picture of Bong Kwang Hyun in TVN 's wise doctor' s life, shows off his unique and sophisticated aspect.
Lee Joon-gi and Moon Chae-won also over-conflict factors in TV viewer ratings humiliating rhetorical genres Detective Moon Chae-won's fashion is also immersive, disturbing TV viewer ratings 3% vs. atmosphere reversal agents.