i have to say that this is probably one of my top ten pens i use on a regular basis. it is the closest i have come to using a quill pen, and unlike the steel tip inking pens you can get at most arts stores the flow is fairly regular, mostly even and most importantly, it won't tear the page (unless you are really, really trying to. the ink does bleed so line control can be an issue for extended strokes, but its ability to detail tines bits and scratches is good, so long as you're really quick.
another HUGE plus is that the in is great for inking pencils, you can get a variety of line width depending on how you hold the pen and how hard/long you press, best of all, is that like the micron, you can go back and erase the pencils after it dries and the ink stays dark. this is not the case with the majority of pens i've used.
you can find these at most art stores, going for around $4-$5 a pop and if you get lucky, like i did for this one, you might even get it for clearance price. i've sometimes seen these pens at office supply stores as well, so keep your eyes open. if you simply can't find them in a retail setting there is always amazon.com, you can find pretty much everything and anything there, plus it's awesome in that you actually get mail that isn't bills or junk.