Although I find the 'rootless recognition' discussions interesting - my observations about it's usefulness (as someone who plays mostly jazz oriented piano)are different than Scott's. While I like the fact that some 'traditional' voicings can be 'rootlessly rendered' - having to voice those chords in a particular way just to achieve the desired bass line is seriously limiting.

For instance - Scott - your example of an Eb A D - G C note selection - while commonly used to form an F dominant chord -
I tend to use that voicing for exactly what your keyboard says it is - an Eb major seventh with a 'demented' fifth. - even more commonly I use it to form the color extensions on a C minor - sometimes an A half diminished depending on the inversion of those notes - .

What is infinitely more useful to me is the chord lock function so that I can trigger a chord by whatever voicing is necessary in the left hand - hit my foot switch locking the chord- and then start using my left hand to hit all the coloring I want for that chord - w/o having to worry about recognition. I used that technique on the SD1 and except for the fact that it locked out sustain at the same time - it was perfect for me.

Mike