I tried this a few years ago when I was naively attempting to separate vocals from a mix (you’ll never get a stem unless you got a stem).
After a week of fiddling, I abandoned it and it rotted on my hard drive until I built a new computer.
I still have the Sony license key somewhere.
I suppose it’s a good tool for cleaning up an otherwise pristine sample but its application is pretty narrow and it has a relatively steep learning curve.
It’s interesting, but not very useful for me.