A great gadget to get the type of sound desired, without the hassle of needing two amps or your guitar amp and the pa system, for about $50 less than the competition.
Never having used a Heil Talk box or the Roctron Banshee, I cannot compare this one to the others. However, as I understand it the Heil requires two amps, and this one does not. There are two controls, one for volume and one for growl. A plastic tube, along with two small michrophones, leads up to a mic stand from the pedal. The mics are plugged into the pedal, and there are in and out plugs. It can either be operated by battery or a (not included) adapter.