Rodinal has been around for 100+ years, and has been used by many many many many photographers. It is a very interesting developer, not only because it's cheap and indestrctible but also gives pictures a very "rodinal" feeling.

I used it long time ago (hwen I was learning to process myself) and I came back to it about two years or so ago, wonderful stuff with APX-100.

I think is no silver bullet, Xtol is far more advanced and even the old D76 can give you better results but Rodinal is so damn convenient.