The reason I put it on the inside of the inside of the case was to avoid how ugly that sticker looks on the outside. I was hoping that adding a bit of magnetic force would be enough to keep it in place. I wasn't complaining, either, but looking for assistance in making use of a device I absolutely adore with my new phone. Thanks for adding nothing to the discussion, though.
As an aside, I've recently added a Diztronic Case (made especially to fit the charger back on the S5) and since it's a Matte case, I still had issues getting it to stick to the Airdock effectively. I bit the bullet and placed the Airdock sticker on the outside of the case (it doesn't look as terrible since the diztronic case is all black) and it's working great. My plan is to try and "polish" the case, though, and see if I can't make it work without the sticker. I just prefer the clean look of the case, un-marred by a goofy sticker.