It could use more tweaking - I tried to read the latest pg essay with it, but all it would display was the image with the light "PAUL GRAHAM" text at the top of the page. I then tried to go back to the essay, but it looks like the only way to un-Readability the page is to reload it. I then tried to highlight the text that I wanted to read, but Readability doesn't take this into account when generating the page.<p>When you have a service that guesses what the input is supposed to be, there should be a way to gracefully fail and allow the user to manually specify it, and if that doesn't work it should be easy to disable the service.