I am new to this genre and actually liked the overall plot and concept very much. It was entertaining, and in the main, well written. There was a fair bit of character development too, given the relatively short length of the book. I expected it to be erotic, and it was. Some of the scenes were excellent. Sensitive too. If I have a criticism, it is that after a while it got a little repetitive. It seemed to lose a little momentum. Not a bad read at all.
Really liked it. It avoided the trap that many books in this genre fall into - either the action is so mild that the protestations of pain seem pretentious and meaningless, or they seem abusive of the sub - to the point where it ceases to be amusing or even interesting. But the author has developed a brilliant device here, where the action is really quite extreme but the sub genuinely controls it too.
Well-paced, exciting, titillating and with a certain sense of lightness about it.