Before picking my wife up at work today, I stopped in my mechanic's garage to say hi. He was not too busy at the time, so we walked around the complex to A&J Racing and I picked up a JDM passenger sun visor, while he inquired about the LED daylights for his own vehicle.
The difference between the stock North American one and the JDM visor is that the JDM one has a flip up mirror on the underside of the visor, as well as two pockets in the front for business cards and/or parking passes, etc. The mirror is a big plus as the wife can now fix her makeup easily. The lack of this mirror was a big pet peeve I had about the Fit from the beginning.
Installation of this item is a cinch. There are two exposed torx screws holding the sun visor in place. Remove these two screws and reinstall the new visor in its place. Easy as that. My wife used it as soon as I picked her up from work that day as we were heading straight to a friend's birthday dinner downtown, so it's definitely worth it.