Adonit's Jot Pro stylus differs from most of the styluses you will find in stores — they have a fine metal tip, rather than the usual rounded rubber one. They're designed this way for activities that require high precision, such as making handwritten notes or adding fine detail in art apps.
The Adonit Jot Pro is the higher-end stylus of the range. And it's handsome: an aluminium and steel body wrapped with a black rubber grip, and a screw-top lid that you can put at the other end of the stylus while you're using it. This keeps the cap safe (how many times have you lost pen caps?) and lengthens the barrel of the stylus, comfortably.
The metal nib is set within a swivelling plastic disc, so it is a flat surface that meets the surface of your screen. The disc feels a little delicate, but it serves a couple of purposes: it provides stabilisation, while its flexibility means that the stylus responds well to the natural movement of your hand; and the fact that it's clear means you can see what you're doing much better than if you were using a rubber-tipped stylus. The visibility is fantastic.
As for the metal tip itself, it works really well, giving smooth, clean lines, and the metal screw cap protects it when not in use.
It's not as intuitive as a rubber-tipped stylus, though, mainly because of the surfaces involved. When you write with a hard pen, you are used to encountering a slightly yielding surface (paper), so metal on glass naturally feels ... well, different. Less natural. It took more getting used to than a rubber tip, especially since (the one area where it does differ from a regular pen) you have to lift it quite clear off the screen in order to stop sending the capacitive signal. You can get away with less distance when using a pen and paper. This isn't bad, mind you; it's just a curve, and a shallow one, at that.