Well, this has been the best fantasy series I have read in two years. And the reasons for that are so basic, I am shocked myself.

It's solid. Characters are solid, story is solid, even world is solid (the world building has its flaws, but it makes sense within that book)
It was fun to read.

When the evil people showed up, they stayed evil, the plot twist were executed well and characters stayed consistent.

Also the story is absolutely my cup of tea. Beside the angels x demons and reborn part, it's also pretty dark but has some humor in between. Really nice.