I'm using this with a Yamaha YPT-300 and it works fine except that the pedal is very light-weight.  I kept having problems finding it with my foot or having it move.  I found a piece of wood 9"x16"x3/4" (23 cm x 41 cm x 2 cm) and mounted the pedal to the board with double sided carpet tape.  (Glue would work too.)  I even put little rubber feet on the other side of the board.  This setup works perfectly.