I enojoyed this sympathetic assessment of Derrida's Influence on Philosophy and on his own work by Simon Critchley, in the German Law Journal:

There is no doubt that Saussurean structuralism enabled some stunning intellectual work, particularly in Claude Levi-Strauss's anthropology, Jacques Lacan's reading of Freud and Roland Barthes's brilliant and enduring literary and cultural analyses. But that doesn't mean that Saussure was right. Therefore, Derrida's early arguments in this area, particularly the critique of the priority of speech over writing in the hugely influential Of Grammatology, left me rather cold. Talk of "post-structuralism" left me even colder, almost as cold as rhetorical throat-clearing about "post-modernism."
...
Although, contrary to some Derridophiles, I do not think that he read everything with the same rigour and persuasive power, there is no doubt that the way in which he read a crucial series of authorships in the philosophical tradition completely transformed our understanding of their work and, by implication, of our own work. In particular, I think of his devastating readings of what the French called "les trois H": Hegel, Husserl and Heidegger, who provided the bedrock for French philosophy in the post-war period and the core of Derrida's own philosophical formation in the 1950s.

Read the whole thing.  ¶ 1:39 PM