A few features are missing

The pen is indeed good in the hand, but does not support all features of the Galaxy Note 10.1 and the original pin.
The tip is not replaceable, you have to come to terms with the very smooth white plastic tip. But I prefer to write with the gray slightly rubberized tip.

The pen is also not sensitive to pressure. With the original pin can be wonderful, the line width of the pressure vary, that does not work with this stylus.

What advantage the "pen in the pen" to have concept, also not open up to me.