As GeorgeBMac notes, the FX line is weird, the spec is all over the place for brakes, with calipers, discs and Linear Pull (V's) in there. Unlike most brands, there is no constancy for the line.
For the being a fad, they were first around in the 1970's, but didn't take off properly till the late 90's, and are now standard on MTB's, and as soon as the UCI allows it, they will be common for road bikes.
For if they are worth if for you, Fietsbob has it for road riding , if you ride on the road, in the rain, then yes, if only in the summer / dry weather, then no.