anyone ever use one of those Gore-Tex patch kits REI and other places are selling?

I have a 1" cut in the butt of my $$$ ArcTeryx pants and really no time to send to a pro repair shop. Will one of these patches last for a 2-week trip that may see a lot of use of those shell pants?

Or should I just put some gaffer tape on both sides and bring a few more strips just in case I peel it off? got duct tape in the fix kit, too.