I've tried several chord-generating plugins before. Some of them where better than the other, but this is a really good one. Actually it is the first plugin (IMHO) that actually does what it's supposed to do: offer you creative, but yet correct chord-progressions at a click of the mouse, without just being a black-box-of-instant-cheesy-midi's.
Don't be mistaken by the (at first) somewhat confusing interface: it is very logical and well-layout. After fiddling around with it a bit, you'll grasp the logic of how the chord-progressions are built up. So you not only get the chords, but learn a bit of music-theory as well.
I've tried it using a few host-sequencers without problems and it seems very stable. I also had some questions for the developer and his response was very quick and clear, which is always nice.
The documentation is clear, although there could be somewhat more information to start with at first. But hey, you want to make music instead of reading manuals and the plugin is self-explainatory enough.
For the sound-part, since this plugin doesn't generate sound itself, this totally depends on the plugin your using for output. For the same reason there aren't any presets. You can save your chord-progressions though and exchange them with other users at the website using the online database. On the other hand, if you see the chords as preset, the possibilities are almost endless 'cause they're generated on the fly.
If you're into dance-music (like I am), use the plugin to create a nice chord-progression, add an arpeggiator, create a bassline based on the chords and you're ready for your next great track!
So, if you're looking for a plugin that delivers great chords for your new tracks, I'd say go for this one and be surprised!