The original sustain pedal for my YAMAHA P-255 is just to bulky to carry with in a keyboard bag. I bought the FC5 pedal as an lightweight alternative for the road. This pedal has not the same feeling as the FC-3A comes with but it is absolutely enough for my gigs in a blues-rock band. When playing classics I definitively would go for the FC-3A instead. Again it is a bit pricey compared to other offers. But this is what you have to take when choosing original manufacturer parts.
Very good quality, it works trouble-free since the first day. It sticks on the ground and doesn't slide away with each push, like other pedals. It is also compatible with several devices witch use a non-latching footswitch and it works perfectly in every situation. I will buy another one if I get another synth.