I got the pen with mine yes. Works very well, including the handwriting input. Useful in a narrow range of circumstances. Obviously good for drawing, but I used mine to read and make comments on documents on a plane, where you can’t really type properly. It worked reasonably well.
The original idea for me was for sketching diagrams when talking to people or in meetings, which is common in my work – we use whiteboards or paper usually and people end up taking photos of the resulting drawings. However my corporate IT guidelines prevented me from using the device for work in the end.
You can set a double-click of the button on the end of the pen to activate any app you want whilst waking the device. There are note-taking apps that simulate a paper notepad, so you can just grab the pen and start writing or drawing as if on a paper pad – but everything is saved. And of course it’s infinitely erasable unlike pen and paper – the button on the end of the pen works like an eraser which is great.