Jnats span a variety of qualities, from bevel setters to uber finishers. I enjoy many of them, others are just kind of routine but all are unique. I don't have other naturals that can rival the best of the best Jnats.
Most are very pleasant and easy to use and you can adjust for the stone qualities with naguras, slurry thickness/clear water and so on. Many are so fast and fine that they can finish a razor off a 1k stone (though I prefer a midgrit or two), and other than a coticule I don't know of any other stones versatile enough to do this.
And when you find that finisher that can make silent HHT5 root in/root out on a stock Gold Dollar, then you have something special.
Cheers, Steve
Jnats: Sharpening Razors Or Something More?