Disappointed by the quality of these products

These pens are too light and suddenly the responsiveness is not enough on the screen as it lacks the necessary strength. I already have a stylus that came with a tablet protective case and it has nothing to do with the quality. This pen is heavy, no effort is required for sail smoothly on the screen of my tablet or my smartphone. But then, with these pens, it is otherwise. Do not buy that for writing sms but do not count your screen to respond to the first touch with the nozzle in terms of the back or otherwise return key.
In fact, these pens are hollow inside so you have to press hard on the screen for some sailing (except to write a text message in which the reaction is reasonable). But I do not see the point of using a pen to write a simple sms and place to do other manipulations on his phone. So disappointed by the quality of this article. I will see to buy quality the next. There are several for the price of one but better to get one that works well as several low end.