That is not bad, but it is too expensive, here. I have been using a potassium chloride and urea mix that is actually beneficial to plants. It's not quite as fast acting as calcium chloride based products, but the urea is acidic and it sustains the ionic action (heating) over a longer period. Plus, it doesn't destroy concrete.
BTW, if the city used calcium chloride based products, there would not be ice on the sidewalk at two below zero farenheit. It actually gives off heat as it dissolves. The problem is that it absorbs moisture from the air and it won't feed through their salt trucks very well, because it clogs them up.