I give it a "meh." Christian non-specific relationship book, though not as interesting or well-written as the Dillow and Pintus book (which is alluded to multiple times in this one).
Paints with a really broad brush. ALL men are visually stimulated and are turned on by everyone/everything they see, and ALL women are filled with empathy and need an emotional connection and put other worries before sex. Boilerplate advice about going out on dates, hiring sitters, and making your relationship/sex foremost on your to-do list. Wives, put out for your husbands even when you're exhausted. Husbands, start seducing your wife several hours before you want to roll in the hay. Porn and romance novels are bad (except for Song of Solomon).