frankly I do not know what to think ... very very mixed

Very very mixed ...
The basic story (the theme and the alien side) integrated into an erotic romance could not be wrong if the author had better exploited.
Personally I have had trouble cashed heroin. I found the interesting character of Korum, friendly and super patient with Mia (too well), I liked his dominant side, jealous and passionate.
Mia against me by swollen for all the book. She is naive (believing resistance without even knowing it), it is selfish, temperamental, she knows what she wants (the style she heats lie with being willing) and after rebukes of speechs ( almost accusing him of rape), it is kid in his head and I find hyper racist (against the alien race) it considers that because of his race regardless of their behavior (yet impeccable with it) ,
[Spoiler] plus she is unfaithful half (it will not follow through but probably only because Korum arrives in time) ...
And the worst I think it's his betrayal. She plays the double agents and spends his time betraying, at the end because of his betrayal he could even get killed and yet even knowing that it goes all the way ... to be heartless when she sleeps even with him and he is adorable with her [/ spoiler]
In short, for me not deserve it.
I think I read the 2nd and 3rd (I already regret the lost uros 13 in this book) or really should I read in the comments that the heroine has changed behavior because there she often irritated and disgusted me.