These pens are nice for things like pushing buttons on a Sony Xperia Z tablet, where your fingers might be a little bit too big. However, I intended to use these pens as a stylus for writing notes on my tablet. For that purpose they are very poorly suited.
With your finger can draw continuous lines in most note taking apps (Evernote, Papyrus, etc.), although it is very hard to write clearly. It would be much more convenient to use a stylus for that. However, when you use these pens in either of these apps, you get very discontinuous letters. For instance, if you try to draw a straight line, only half of the line, or just a few dots may show up. Rarely do you get the full line. I have tried pressing very softly, or pressing harder, but nothing seems to work. I have also tried different pens in the package to make sure that it was not due to a single defective pen, but I got the same results using all of the pens. There seems to be a fundamental fault in either the design or materials in this stylus.