No way IMHO.
I have never used a Chord sequencer but from what Diki describes, this Music Presets thing is primarily for home use.

My ancient Casio (CTK 750, TOTL for 1994, coincidence? ) also has this, although it does not have any option to create your own. It gives you a number of "pre-programmed chord progressions", (a ready made accompaniment set, also the chord progressions for each preset are written in the manual so you know what chord comes next) and you simply play whatever you want with the right hand (or both hands).

It has a number of easy chord progressions like Am, F, Dm, E (like a run of the mill pop song, and repeated until you are bored) and also has more advanced and lengthier sets where more complex chords are used.

Useful for practice, nevertheless, you get a chance to play along very complex chords and try to produce something pleasing to the ear. It may also give you an idea of how different chords interact musically when placed in a row.

Alas the functionality and button presses required in this Casio would prohibit it for live use as Diki wants. Maybe next time.

An interesting thing I noticed while browsing the manual, is that this model can import styles from earlier Casio models and play them as is. Useful if you for example had created user styles on the WK you had.

[This message has been edited by trident (edited 09-19-2010).]