Starting off it was expoentionly good, but as you watch you realise that has typical plot but at the same it's unique,
Good factors:
*It contained amazing chemistry
*it was really funny
*The acting was amazing
*it was pretty exciting and I kept waiting for new episodes eagerly

No not so good factors:
*The storyline was messed up
*At some point the storyline was so predictable
*The timing and everything was going downhill as we reached the end of the drama
*It just had too much things
Spoilerrr - gu won returning as a demon make sense as he was immortal as a demon, ofc he would grieve for do hee if she died because she's a human, she's bound to die since she's an mortal, it would only make sense if he returned as a human

Not only me but many people think the same
So iam not tryna offend anyone..
In conclusion I really liked it overall I would recommend it