I don't know how to rate this. Do I think it's a Good Book? Absolutely not. 
Do I think it's good within its category? I don't hate it? The category being: smut/porn with a plot/romantasy. 

I didn't find it as predictable as others have noted. I did find myself wanting to continue reading. Okay, the exception being that there was a part in the book where I couldn't bear another sex scene so close together for lack of substance. But after that, it got better. 

Basically: it's an easy, enjoyable read. Don't expect too much.

Also, I'm not one for quotes but that part where he goes something like "you doubt my ability to conquer a kingdom, fuck my queen, and hunt a witch?" LOVED IT.