I follow this forum because my wife has an LG4; I use the Galaxy Note 3, and use the dual-windows function when on driving trips.
I have Google Maps open in one window, to show our route, provide directions, etc. We usually listen to Podcasts, so have Beyond Pod open in the other, smaller window, so I can pause/restart the Podcast with a quick tap. This is actually one of my favorite functions with my phone.
Haven't tried it yet on my wife's LG4, so don't know if it's easier/harder than with my Note 3.