Hi,
I have the justmobile alupen and it works great. It also looks beautiful.
But be careful: I suggest you to buy a screen protector.
I have just learnt that the usage of a stylus does not damage the screen, but it affects the coating on it.
In my experience, as I write extensively with the zoom function, this turned out in having one horizontal stripe at the bottom of the screen (where I usually write notes) that catches A LOT of dirt and is more difficult to clean.
So my advice is: no matter what stylus you get, make sure you have your screen protected!