The art brings an undeniable comfort, and precision is good, without being always excellent (though updates of applications that support the pen gradually improve the situation). The recognition of the palm is far from perfect why not offer the choice to recognize that the contacts with the pen? Pressure levels are not fully convincing either.
A point that is not often mentioned is the fluidity brings the material: unlike rubber-tipped pens, metal mine slides well on the glass of the iPad, and it is much less fatigue in writing But to underline or highlight, accuracy is lost due to landslides. (No fear for the iPad, no scratches or trace after several weeks of use.) The iPad stylus shock is a little noisy, but we made it very quickly. It may be annoying in a very quiet place.
The autonomy of the stylus is small, rechargeable batteries are highly recommended. A stack can hold one to three days depending on usage total, I think, a few hours, certainly less than 15. To overcome his greed, the pen starts fairly quickly in standby, which can be annoying when the we annotate text. When I write little at spaced intervals, I often find myself using a capacitive stylus Wacom Bamboo.
In the absence of integrated solution, it is the best stylus for iPad. But we must not delude ourselves, this is not the same level as the Wacom solution adopted by Samsung for the Galaxy Note.