Took a little longer to arrive, but still within the promised delivery dates, so no complaints.
You need to push a bit harder to get the pen to work (I have an expensive pen to compare this with). The rubble tip "shrinks" easily and could make the mental part of the pen come in contact with the screen -- which my kid managed to do!
Using a pen is way better than using one's finger and you get less tired (or RSI) from using fingers, but this is not the best pen. It works but beware of its drawbacks I have mentioned.