Are you talking about something like this? http://www.livescribe.com/en-us/
I have their older series but unfortunately I have no opportunity to use it. The recording works good in smaller or quiet rooms like a school class, you can hear the pen scratching over the paper, but that is no problem unless you want to release the recording to the public. The pen feels nice if you like bigger pens. I have big hands and welcome the change of form. Writing feels a little scratchy, the line is very thin and maybe could've used an ink that is more fluid, but as far as I remember, there are different cartridges to choose from. The tracking of the writing forks flawlessly, it doesn't miss anything, not much to say there.
I could write about the paper, the software, the option to print your own dotted paper, but do you have any specific questions?