I purchased a KORG PA1X PRO and returned it after three days because I was disappointed with some of its features. I own a Yamaha Tyros and was able to compare the two keyboards. My impressions and comments are as follows:

Sounds – The Korg has many outstanding sounds. The brass, guitars, accordions, and harmonicas were excellent. These categories are superior to the Tyros sounds. The acoustic piano is a different story. Tyros wins – no contest. The Korg grand piano is very thin sounding and weak. The Casio WK3000 has a better piano sound then the Korg. I also liked the Tyros electric pianos, electric organs and saxes better than the PA1X PRO sounds.

Key Feel – The action and feel of the PA1X PRO are terrific - much better than the Tyros.

Styles – The Korg Styles were good but I prefer the Tyros styles (My opinion, yours might be different).

Intros and Endings – Both keyboards have three intros that work about the same. The PA1X Pro has two endings. Ending one has a built in chord progression and ending two is a short ending using whatever chords are played. The Tyros has three endings with one ending playing a simple one measure ending. I usually play my own ending and hit the Tyros one measure ending on my last measure. The Korg does not let you do this.

Fills – Another area the Tyros wins hands down. I think the fills have serious problems on the Korg. When I play a fill on the Tyros, it always sounds smooth and musically appropriate. I can start a fill in the middle of a measure and it always comes in right and with the correct timing. With the Korg, the fills have the right timing when you start the fill exactly on beat one. On some styles, if you hit the fill after beat one, it feels like the timing of the fill is off from the timing of the measure. It feels like the accompaniment skips when this happens. It is like playing with a bad drummer. I think this is a software bug and hopefully could be corrected with a software update.

The fills have another problem. On some styles, when you hit the fill button the overall volume of the accompaniment increases quite a bit. The volume then decreases when the fill is over.

The Tyros has a setting that automatically plays a fill when you change variations. I think this is a great feature and use it all the time. The Korg does not play fills when you hit a different variation. It does let you program the fills so when you hit a fill, the variation will change based on what option you selected (increment to next variation, decrement to previous variation, or go to a specific variation number). Since there are only three fills and four variations, you do not have enough fills to switch to all of the variations. Also, it is way more complicated than the Tyros.

User interface – The user interface was not bad once you figured out how to do things. The touch screen was fine and better than I thought it would be. I still like the interface of the Tyros better. I think it is the most intuitive and easy to use of any keyboard I have played.

Summary – I decided not to keep the PA1X because of two reasons - the weak piano sound and the problem with the fills. This is only my opinion and others may feel different.