It does exactly what it says. It is free to download the software and is comparatively easy to use when compared to many comparable programs.
When I first tried it, I thought I would be able to produce music for free. You can make the music for free, but it costs money to export your project as an Mp3. Its simplicity does not allow for infinite variability.
It is a good program to use if you are fine with paying to download the song you created. Though the program is easy to use, it does not allow for infinite possibilities of songs. Also last time I checked, it costs 0.99 USD to purchase your song.