Water Car Pro is a brand new product on how to convert your car into a water burning hybdid... so let's go through some reviews a few sites have made for it so far.

run a car with water (at watercarz.com)

Watercarz.com gives some interesting information on Water Car Pro. Their homepage just gives some general stuff on this topic, which is a useful read if you are brand new. They also have an articles page with more information.

As for their review of Water Car Pro, they have a lot of positive stuff to say about it. According to them, the guide is easy to understand, has lots of diagrams, has no fluff and filler and even comes with some nice bonuses.

They have actually tested this guide on their own car, a Toyota Camry. So far they have had no problems, although it did take them a couple of hours to install everything. The net result is that they saved a massive 45% on gas costs (representing big savings over a long period of time) and the MPG has increased from around 30MPG in the city to 43-45MPG.

use water as fuel for cars (at forgetfuel.com)

This site has an interesting blue/white background and does seem to have some useful stuff. They have a bunch of articles, as well as a set of video's on the homepage going through the technology (although these are just taken off youtube).

As for their review of Water Car Pro, they do seem to have some good things to say about it. According to them, you can save a lot of gas and get higher MPG, although it will depend on the type of car you drive. They claim you can increase your MPG by 20-80% which is a pretty wide range. Typically, you can expect your MPG to double or more. This is especially true if you normally drive a car that consumes a lot of gas.

convert your car to run on water (at watercarinfo.com)

This is a very funny site. For one, they don't have ANY graphics whatsoever. The whole thing is just a white page with plain text, like Google. However, the site itself does seem to have some good content, and will probably get higher rankings and more authority as time goes on.

They give their review of Water Car Pro on their homepage. The accuracy of information, safety and ease of use are the 3 things that apparently make this guide really good. They also have an interesting articles page with more information.