I'd been curious about this because of a review at Smexybooks, but the price on Amazon kept dissuading me. I stumbled across it again today (actually because the author's alter-ego has a forthcoming book from Samhain with a cover that has seduced me, and how is that for a truly weird reason to buy a book) and I finally decided to buy it.
$8 is a lot to pay for a relatively short ebook, but I'm glad I got it, which I suppose says a lot right there. It absolutely pushes boundaries and at times went a bit too far for me in some ways. However, there was never a second where I wondered about consent, and that made even the uncomfortable bits fascinating.
Heed the warning, if you have triggers, but this is one of those rare books where I never doubted for a moment that both parties were entirely on board, even when I, as a reader, might not have been.