Adobe audition, Reaper, Aimp, Foobar2000, Jriver media center
It can ruin the bass attack—phasey tricks with decompression. If it does, turn it off (it does more harm than good).
I’ve noticed that it restores old recordings perfectly, but often ruins the bass with modern ones.
As the developer himself writes: “Under no circumstances should you leave it running all the time—it will actually ruin normal dynamics and make them monotonous.”