I find this book extremely useful in my job. It covers almost all aspects of exotic and hybrid instruments: the real life examples, theory behind the pricing models, implementation using different numerical methods, hedging and risk management issues, a good appendix on the basic math stuff and even a sample VBA code to do multivariate MC. Most importantly, the author took a practitioner's point of view, which makes the materials much easier to be understood and applied. However, I did encounter quite a few errors inside some of the formulas. Just name a few, Eq 3.15 and 3.18 on pg 53, Eq 3.142 on pg 98 and Eq H.61 on pg 336. However, none of them is serious (more like a typo to me). In addition, I think it is more important to get the idea right. You can always double check the formula against any math reference book. Overall, I feel it is an excellent reference book for anyone with a serious interest in structured derivatives.