I got two of these for my SL88 Grand, one for sustain, and one for una corda. I wanted continuous pedals so that I could exploit the many options Pianoteq 6 Pro offers (e.g. partially muting strings when you leave the sustain pedal on the middle). These are phenomenal and work great with the software.
If you're using it for the first time, be aware you need to switch the polarity from Pianoteq (if you go to the MIDI settings, you can set the minimum value for this pedal to 1 and the maximum to 0 (it's initially set to min=0, max=1).
I also appreciate the generous cable length!