Not really too deep, so if you're just looking for a novel to fill your time, it's an easy to read to the end type of series. In regard to the translation, it's ok, but the constant pop up ad viruses gave me a headache. So beware of the translator's site might give you some viruses. To be honest, I found it a relief to read from the raws, because I didn't have to be on guard from the pop up viruses.
The romance itself is just ok. I do like the heroine's outlook on romance. If both leads were willing to give a shot, then she was ok letting things flow. If not, she wouldn't turn back. In the beginning the heroine was really rude and obnoxious. She got a bit more likeable at the end with her snarky comments.
Probably, my favorite relationship in the series is between the MC and her father. They're cranky snarky quarrels were really hilarious. Even the arguments between the male lead's master and everyone else were funny.
My main problem with the story is that all the snarky quarrelling got repetitive. If it was one or two characters it would be more interesting. But the author started having all the main characters have similar personalities almost. I was actually surprised that there wasn't an epilogue detailing what happened to the second generation of kids. It's a happy ending, but it felt it ended a bit abruptly because the couple just decides to leave and visit another country at the end. So it's a bit open ended whether their adventure will continue or that's the happy ever after once all the political intrigues got resolved.