The manufacture of the object is neat, it shows. Brushed metal class enough and perfect functioning of this ball system - however you imagine quite fragile (a metal cap is also provided to protect it when not in use).
But I have not been convinced by the usefulness of this style. I did not notice any significant difference in accuracy compared to the finger on a phone screen (so much that on a shelf, it is even less useful). I did some tests by typing the alphabet, I see no noticeable speed difference or decline mistake rate. More annoying: I find the contact of rigid plastic disc that slides on the screen a bit unpleasant, and it is less accurate than finger clicks (sometimes you insist when pressed) or drag and drop ( loss of pressure during movement).
A notch is provided on the body of the stylus to fix it, but I do not know what. In any case there is no simple and obvious way to hang the phone or the pen to the tablet, which means it is an additional object to be transported if you want to carry around when you need to use his phone. And what cap when the stylus is used?
In conclusion, I find that the gains of comfort provided by this stylus is very low - even negative in some operations - to justify taking the trouble to have it always with you. I am not convinced by this object.