I think that means Eric sells it.
I've used the FPPF since early on with my motor. I can't really vouch for how good it is versus the Primrose, but I tried the Power Service and my mileage went down.
I have been told that certain additives can actually reduce the BTU's of the fuel, but that was just a comment I took with a grain of salt.
Find one you like and stick with it.