If you like that Audya harmonizer, you are going to LOVE the PA2Xpro's, or the G70/E80's...

And you will have a guitar track that won't change sounds on you as you play different chords

To be fair, you have to at least compare to those in similar price ranges (although the T2/3 isn't reported to be any of an improvement over the S900).
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An arranger is just a tool. What matters is what you build with it..!