What exactly do you want to know about the book? I was one of the playtesters and have a copy.
Feel free to stop by
www.valarproject.com and join the forums. Your questions there will receive more comprehensive answers and you'll receive more positive (obviously) feedback about the book.
As a short summary;
It contains rules for a 7th stat, appearance, with charts giving the average apperance for most creatures from the Core Book III.
Some skills are added, for sexual preformance, as well as rules for stamina and sustaining sex.
There are 3 base classes and a number of prestige classes that revolve around sex and romance or the "idea" of sex and romance.
My personal favorite prestige class is The Rake. A rogueish class that uses sex, or the temptation of it, to glean information from her targets. (For a good example of a real life individual who did the same, there was a show on the history channel about a british spy during WW2 that slept with imporant french and italian commanders to gain important naval codes.)
The book includes spells that work with and without sex. Feats, and various items.
There are a few new monsters too.
Its fully OGL compatible and quite well balanced, there arent many erratta errors either. (The fans on the boards are posting erratta questins and opinions as time goes on.
The art is photoshop manipulated photography that uses real models of both sexes. Personally I like it and think its quite tastefull and artistic. Its up to you to make up your own opinion on this though.
See ya on the boards. Hope the info has been helpfull.