Yes this is a very useful function. I find the best way is to just put in a few chords of your song with correct tempo and song form for exact number of bars of your excerpt and set for one chorus only. Also turn off the 2-bar ending. Then make sure loop entire song is ticked. I find that otherwise when you double-click a new style to audition it will only generate that bar of the song which is not much help! If loop song is ticked then the whole song sheet will be played as soon as you double click any new style.

All in all a great way of quickly auditioning styles in your song. You can then make a note of your choices for your final arrangement.