I'm looking into getting a fuel piggyback soon, I don't like the S-AFC's flashy screen or it's high price. That led me to the HKS S-AFR, and I now have one on the way to my house.

Does anyone own or have any real life experience with an S-AFR? I've read about some guys that use it, they like it, but it is far from popular... why?

And please don't give me answers like "The S-AFC must be better because it has a pretty blue screen!"