My buddy just installed one on his SUV. I'll give the quick synopsis since and you can visit their website for more details.
Stage 1: Hydro Assist Fuel System
Vaporizes and ionizes the fuel breaking it down for a cleaner and more complete burn. This will increase your fuel efficiency by a minimum of 50%, some cars they have seen up to 300% more efficient! The cost is only around $1,000.
Stage 2: Upgrade the HAFC by adding the Pre-Ignition Catalytic Converter (PICC)
It sounds like this is not completed yet. Basically breaks down the molecules even further. This will get cars to 100 miles/gallon or higher!
Here's their website. I am in the process of ordering mine.