I very much enjoyed this book. Well written, creative, useful and easy to expand upon.
The author clearly warns the reader that the create a trap section is complicated - something I very much appreciated. It IS complicated and requires a bit more than casual thinking. Investing the time to think carefully about the possibilities allows the DM/GM to create some pretty impressive things.
Well worth the money and will likely be a reference for years to come. Thank you for the excellent product.