Post Magazine has written a SmartSound SonicFire Pro 4 review. The author takes apart each piece of the program pretty well. If you are considering investing I would definitely recommend reading it.
The software is extremely powerful and offers maximum flexibility with its library. Customizable durations and the ability to mute and un-mute various instruments is worth the price alone. SF4’s downfalls are: mediocre music and very limited choices.
