See Thilo G's review for a super-detailed and IMHO, accurate review.
I'm just going to hit the highlights.
Firstly, I liked the ideas in this book. I think if this had come out a few years earlier, the alchemist class would probably more closely resemble an "actual" alchemist instead of the Edward Hyde: Midnight Bomber.
On the other hand, I thought that most of the new items were overpriced, at least for the economies of most games I've played in, but to be fair, most of my experience has been with lower level games.
The proofreading was terrible to non-existent. Guys, while not everybody's naturally gifted at writing, it's also not all that hard to find someone with mastery of the language willing to read through it.
Criticisms aside, I'd still recommend this book. While it may need some tweaking to fit into a given campaign, the ideas are very strong.
[4 of 5 Stars!]