Miditech MP-1

This is a perfectly good sustain pedal, does what it supposed to and comes with the plus of being switchable in polarity, which some other more expensive pedals do not. It is perhaps not the heaviest or most stable on the ground, tends to move slightly after some use, but that depends a lot on your seating position as well (and I sit rather high, therefore enhancing this side effect). If you are just looking to complement a secondary keyboard this is very much fine and you can save some money to get something else instead. If you are looking at this as your primary pedal, you could instead get something a bit heavier like a Korg or Kurzweil.