I don't know what all the fuss is about. I spent a good portion of last evening with OS2 on my Pa2xpro. The board feels like it's a brand new keyboard. I didn't have any fill or transition issues, all the styles seemed smooth and lively. The board actually sounds much more clear and crisp. The new styles and sounds are awesome. The DNC Crunch Guitar with Overdrive, muted strings, string-bend, etc. is awesome.

I believe the styles were reworked with new Cue settings which are now part of the OS parameters for style creation. Many styles are now using the new DNC sounds and the keyboard really sounds better. They obviously spent a good deal of time working on tweaking the EQ and remapping sounds.

I also didn't experience the issues with the multi-pads that has also been stated. What I did as an experiment was to start the multi-pad, press the style start button, and then press stop. Each time I did that the Multi-pad stopped with the style. It didn't matter when I pressed the stop whether it was mid bar, at the end, or not, it simply stopped both the style and the pad. Now I only tried this on three styles, so if it's a style issue I did not try each one.

I'm very pleased with this OS release and you have to be happy with the value proposition; this update was free! Way to go Korg!