Dave I have used it - for what it does it is fine. But the ability to save any particular CS to the same Songbook entry as the song is a very valuable and useful thing...
I mean the chord progression of any song is still going to be the same, and why should one need to bother to constantly re-record a CS every time that song is chosen.
Not much point you suggest me trying to use it - I was using it WELL before you were

on the PA3 (I never used the Roland one)...I know this as I bought the second one into Australia, and Korg Italy had not even released it in the USA at that time

Dennis