I recently posted that it did not work with the U.S. model, but it does. I didn't realize that you had to disable the S Pen battery saving option for the pen to be recognized(almost sent it back until I came across the issue in another forum).
It's a little larger than the default S Pen and has a side switch and an eraser. For those of you interested the model #ET-S200EBEGSTD. It is an official Samsung product. It can be found on the Hong Kong version of the Samsung site. I could not find it on the Samsung U.S. site, or any one selling in the states. I got mine from Ebay for $28.98 and free shipping(from Hong Kong).
I can't tell you how happy I am with the pen. If you have any questions about the pen feel free to ask.