First of all, I must admit I avoided this book for a long time because the blurb did not attract me. But then it was picked as a part of a challenge I am in. So, I read it. 
 There was a reason I avoided it, full on D/s true mates with a bordering on dub con sexual relationship (at least sometimes) is not my thing. Still not my thing. Also, there was a LOT of sex and very limited relationship/plot building. It mostly came down to their bond, which was reinforced by sex. 
 That being said (and this is what saved it from being a one star read), the writing style and editing were high quality. I would definitely be willing to read something by this author again, if it were exploring other kinks/subject matter but I did not enjoy this at all. 
 However, if the blurb attracts you and the stuff I mentioned above is your kink then you will probably love this book. Don't let me scare you off. =)