Yes it works very well on the front. They only tested the Vertex in the FDA trials so they can only claim success on the back.
My only true loss is in the front, were it not to work on the front, I would look like a ying yang designed hairline. Middle of ear back..........only place with hair.........scary..............
BUT! Regardless of FDA claims, I am doing well. So no worries. Pop some finasteride and trim those bangs.....