after several tries with cheap pen for Ipad, I turned to Griffin. The difference is obvious: the right size, a nice feeling and especially reactivity to the screen that gives the impression of writing with a marker! So, I can take notes as if I had a notebook in hand, and my children can draw at will.
I recommend without reservation the object. (Update) But I just tried the Boxwave stylus, a previous assessment indicates that it is identical to Griffin. In terms of appearance, I agree, it looks like twins. For the feeling, there is no photo, Griffin is far ahead.