Only two stars because no matter how stupid I looked, pointing the camera at my head wearing a helmet would not work. Why offer the discount if the feature doeant work? Also, the costs to travel such a short distance in Melbourne specifically vs a free tram..makes this not worth it. Most cities might not have such amazing get on / off infrastructure as Melbourne so the price might work elsewhere. Consider heavily reducing the price here because the competition is fierce and you need to compete.