Interesting concept, but as a music theorist, I have my doubts on the legitimacy of certain progressions...
I can't say the generator is as itself very useful for non-musicians, and is even less useful for musicians, since the chords are for the most part utterly illogical and impractical.
Also, as previously mentioned, the option to change or modify chords would be interesting, especially with the fact that said chords are already sampled.
In any case, interesting concept, but poorly executed.
Cheers,
Samuel Hébert