You can't go wrong with NIN, and you certainly can't go wrong with NIN and a piano.
The soft piano element and Trent Reznor's voice make for a beautiful combination, underscoring a melancholy contemplation of self. The song, like much of the album, is a very reflective examination of Reznor in his older years. I think it's powerful stuff, especially when the song trails off into the rhythmless void of "Corona Radiata."