Let's see, if I count chapter Zero then so far I have read.. Six chapters, out of 45.
I figure reviews are supposed to wait until you read the whole thing, but if you have the slightest interest in this sort of thing BUY IT. SERIOUSLY.
Are you worried about the Choose Your Own Adventure format? So far each "Chapter" with any action has been better than a lot of short stories for individual sale. With an apparent word count of over 150 thousand (I thought that was a typo when I saw the $4 pricetag, but no, that's real), I doubt it is a mere case of front loading the good stuff into the early choices.
This thing is literally the biggest story I have picked up so far, larger in size than some of the bundle collections I have purchased, for a lower price.
While the rest of the Author's current stories are not to my personal tastes, I would so buy more like this in a second if I noticed it for sale. I'm lucky I ran across it basically on accident, because this site search engine is rather lackluster. For example, the more popular tags like Femdom cut off at the 1000th entry (May 4th, 2014 when I looked today). So this story won't even show up if you click on that tag over to the right.
(reviewed the day of purchase)