Uh - Lukitoh;

I respectfully disagree.

The Pa1XPro places the fill in the song immediately - the TYROS and PSR wait for the top of the measure.

This is a big advantage for me when using the Pa1XPro. If I hit the fill on the 1st beat, I get a measure of fill; If I hit a fill on the second beat (4/4) I get two beats of fill. Much more musical, much more useful. As I recall, there are not even any fill buttons on the Yamaha; you just select a button that cause a fill each time you change variations. This of course means everytime you transition to Variation 2, you get the same fill. Not so on the Pa1XPro.

So what one may see as a difficulty, another might percieve as an advantage.