The other apps out there that do what this does cost twice as much. I really love what this does. It has an easy to understand interface (and I'm a total clutz when it comes to learning which buttons to push). I even like their Users Forum. What more can I say? I have used Peak and Tried the Trial version of SoundStudio and find this app to be as good as either of them for what my needs are (mastering home recorded music from GarageBand, and cleaning up band rehearsals recorded with a Zoom H-4). This does the job.