Have not seen that product, but it's probably something that dissolves old fuel varnish, as long as it isn't too bad. A new name for a common solvent, I suppose.

It apparently is much more than just a solvent. Look at the list of claims. None of those are new - products exist to do each one - but they have combined all those into one product. Check out the site.

Here is a link that might be useful: Mechanic In A Bottle

They call it a "fuel additive," but I followed the alternative recommendation, which is to drain the gas from the tank, pour in several ounces, squirt it into the carb with the primer bulb, and let it sit for several hours.

I have an open mind on this seemingly revolutionary product. But in the back of that mind I notice that there are many bold claims. Let's see how it does.

Roger that!