[foreverconfused]

So, I just ordered Bigme Inknote Color Lite. I am planning to use its pen to write regularly, so I would like to clarify a few points. If it helps, I will use a glass screen protector on my screen.
1. I get really conflicting information about the replacement of pen nibs. Do I need to replace them regularly or do they wear out after a really long time? I have owned a HP Synaptic Active pen which had a plastic nib which pretty much never wore out. Is this pen the same.
2. In their store, there are 2 pens: BIGME EMR Stylus Pen and Bigme Pen for the Galy and Inknote Color+. Should both of them be compatible with my device?
3. I have read that ANY EMR pen, including the ones I mentioned above should be compatible with this device. Also, these EMR pens do not use charge for writing and erasing. Is this true? If yes, it would be a big plus for me.

Thanks in advance