The Yamaha audio drum based styles are fine sounding, but it ends there, in my opinion. Editing is very limited, and even more are storage and sharing.
I suspect we will see them discontinued on later arrangers.
That's why I like my Tyros4 so much...no wasted space, and all styles are editable, storable and sharable.
Ketron's audio styles sound very good as long as you keep the chords simple, which is a big limitation for the more advanced player or the growing beginner.
Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.