There are really very few programs I would give a "10" to. I have been using this program for many years- since their beginning, really. For a person who does sound manipulation, it is really powerful, and extremely useful. Its a bit like a swiss army knife for your sounds. I have many many thousands of sounds, and it allows you to set up scans of your HDs for specific sound sets, and the ability to process sounds non-destructively is golden. The interface at first may take a little getting used to, but it makes sense.
CHECK it out, folks. Worth every penny!!! :-)
(No, I am not affiliated with them at all...just love it).