Big issue with this kind of headband is the position of electrodes. Forehead seems like a good place in the first time since the frontal lobe is devoid of hair, however the EEG signal at this place is heavily artifacted by muscular activity (blinks, eye movements, facial muscles).<p>The most "interesting" brain activity also happens in the central axis of the brain (going from nose, through the top of the head and back to the occiput). It is however a design challenge to get electrodes to this place without the use of ugly caps and gel.