I thought that buying a book and following the instructions would be easy to build one of those water hybrid kits for my car . I was dead wrong. I could not find the parts in stock and once I had the parts it took forever to build. If you have the parts and the time, by all means purchase the book and install it yourself. But I did find a much easier way, and I'm not afraid to let you know.
There is a company that manufactures real stainless steel units like the cheesy mason jar one that I made. These units are awesome. They are pre-made, so no drilling and gluing and creating electrodes. Everything is done for you, they even have installers that will do it for you, so they look just like another component of the car and completely professional.
I increased my mileage from 14-15mpg to 24-25mpg in my Toyota FJ Cruiser. I am estatic about that. Sure, I would like to get 50 mpg, but I'll take that increase which is almost double.
Anyway, if you want to see a picture here it is. http://hydrogen-on-demand.net