I've used most everything, from operator programming on DX7's to VAST programming for Kurzweils... I have to confess, as arrangers go, the Korg TOTL arrangers are as complicated and arcane as they come. Basically, the complexity is tripled over most arrangers, because not only do you get a complex TOTL arranger, you get a TOTL synth programming section, with far more options and complexity than most arrangers. Basically, you get a full Triton plus DNC voice architecture (it's not quite up to Kronos depth, but it is virtually a Triton with extras), then you get a FULL sampler, virtually no programming shortcuts compared to other Korg samplers.

Add to that a FULL Songbook function and multiple voice and Performance storage options, and basically, this is as complex a keyboard as any TOTL WS.

If you want to get the most out of the PA3x, and are coming from Roland or Yamaha, you certainly have a steep learning curve to deal with. Add to that, and many of the Korg's functions and nomenclature is quite different from Roland and Yamaha, and many of the ease of use functions (especially from Roland) are missing or less effective. It's almost like starting from scratch for many things.

It can do a LOT, but that flexibility comes at the price of formidable complexity. Use it at its most basic, and yes, you can probably grok it fairly quickly. But if you want to avail yourself of everything it can do, be prepared to shed for months!