For anyone interested in the philosophy of science and technology these essays are essential reading. Heidegger's observations are just as relevant today as they were 50 years ago. In addition to the title essay, "The Age of the World Picture" and "Science and Reflection" are both great essays with rich insights.
Yes, Heidegger is difficult. Heidegger is always difficult. But it is worth trudging through.
For those seriously attempting to understand Heidegger's essays this is a very helpful edition; although I do not know German, Levitt really seems to understand both Heidegger and the nuances of the German language. His notes (while not necessarily clearer than Heidegger) help the English speaker get into the nuances lost in translation which is of utmost importance.