Just removed Mine. Heated them up with a blow dryer for a couple of minutes and peeled while keeping the blow dryer on the front side of the label and keeping a couple of fingures against the fabric keeping them as close to the back side of the peeling label as possible as to not stretch the saggy, weak, crappy fabric on the visors any further.
After, I soaked a portion of a old t-shirt with "Goof-Off" and rubbed it into the fabric until soaked and no visible residue of glue remained.
Then I continued using the blow dryer to dry the visor because is was looking slightly saggier then normal, the fabric did seem to pull up a little tighter.
There is a ever so faint outline of where the label was, There is no way a picture could capture the mark left behind.
Overall, I am happy with the results.

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2008 GT Vert, Manual, Perf. White, Red Leather, Black Cloth Top, I-UP, Active Alarm, HID's, Heat'd Seats, GT Scoop, Sirius, Ford Nav, 18" Polished Aluminum Rims w/ Pony's, Ambient Lighting, Gentex Mirror (Electro/Comp/Temp/Homelink), Jaeger Flaps.