I have watched many of the videos of pro style music.
All their styles are specific song styles.
They have demonstrations also with the psr s970 and also covers using just the keyboard's preset drumkits and voices and sell these styles individually and at a very low price.
One thing that I have noticed is that they don't exagurate on the effects that they are using and they try to make them to sound as natural as possible.
This is just my personal opinion.
(I would have used a bunch of effects,left voices,the harmony button etc.These are the help of the noob player to sound better
)
The keyboardist from what I have seen in the comments is called Dat and he is blind as Vali allready said.
This is one of my favourite keyboard video's on youtube.
Just watch the technique he is using to place his fingers on the keybed again when they move to press buttons:
https://www.youtube.com/watch?v=Q6MjmVJuB0AYes, I would buy it if I had a tyros or a genos beacause these songs that are close to my taste of pop music.
Tooooo many styles there to use and if you prefer another sound you just modify the styles to your liking.
If the styles sound good or bad?
Well,with so many videos,it's up to you if you like them or not