Work very well, processing OK

First the few negative thing I noticed,
-In one of the pins there was a sharp ridge, I could disarm with a pocket knife but
-at 3 pins was the "touch ball" pushed very far, by chance I have but found that you can open at the other end the pin and push out the inner workings can continue
Pins are one probably for some people. too short (especially who wants to handwritten letter / drawing) and a bit too thick (1-2mm thick as a normal ballpoint pen)

Positives:
+ Price is unbeatable, normally you pay easy 4-5 for a pen
+ Pins are used frequently, and I do not even wear (one may also the thing not like an eraser rubbing on the screen)
+ No "traces" on the display
+ Haptics is good
+ Works on all capacitive touch screens (eg iPhone, Galaxy series
+ Next to a clip as we know him from the pen, is still a little hole on the pin end for attaching a ribbon present
+ Pins are also recognized in the hover feature of S5
+ Very robust, as bends and breaks nix
And very important:
+ Inputs also be carried out very precisely (without increased sensitivity of the touch screen) and are in contact with the display always correct!

4/5 star not happen because of the thing with the deburring, should so