Bought Coltrane's Ascension, what, years and years ago. Didn't like it. Was annoyed. Gradually came to appreciate it. Then came to revere it, not as much as A Love Supreme, maybe, but in the same neighborhood. Same depth of expression, different context, same kind of emotional impact on me.
What's important about this? 1) Shows the underlying beauty of the music to start. 2) Recasts, but travels along the same path as, the freely improvised elements of the piece, graphically illustrating that none of it was just randomly issued sound.
A great tool for understanding a great piece of music, and some excellent musicianship displayed in the process to boot. Don't forget the original.