Weird, I typed up a response to this earlier and its not here... I must've goofed, lol...

My experience was almost identical to Gary other than I use a Tyros as opposed to the PSR line....

The harmony M would not track right and at times sounded ridiculous.

Gary Diamond was kind enough to try and help me with this and after a long time of trying, conceded the unit wouldn't be optimal for my style (full keyboard mode).

I am really very happy with the Digitechs.

If I could only find a power supply for them that doesn't break down after a year or so. The wire pulls out from the base. I baby them, but its happened to every single one I've had...

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Bill in Dayton