It is: Educational, telling you the name of a given combination of notes, or letting you hear how a chord with a given name sounds; Practical, for printing out professional looking charts for yourself or others to play; Creative, letting you experiment with chord sounds in a unique way that would be cumbersome to do in a normal sequencer.
What's new in this version:
The whole look and feel has been revamped, from the Keyboard Window to the chord charts themselves. You can now play through the chords in a chart like a sequencer, and you can insert a new range of symbols, including different barlines, key signatures and time signatures. A chart can now be exported as a MIDI file. Also, the names of chords can now be customised, so if you disagree with the default name you can override it.