I got this pen because I liked the multifunction aspect (I have quite a few pen pockets in my work pants, but don't like having to carry too many and risk them breaking/leaking) and I'm a huge fan of Fisher pens anyway. The pen action is unique; to extend the desired point hold the barrel horizontal with the desired tip name facing up so one button handles them all. Very nice for one-handed use; the black/red makes it a lot easier to decipher notes that get reused multiple times.
I just wish the stylus worked on capacitive touchscreens as well, although that by definition might be impossible to do. Not a big issue though; there are still resistive screens where I work and I've found I can use the stylus tip (carefully) to break packing tape on boxes which is nice for when I don't want to take out my boxcutter or forgot it.