I got a couple callbacks from it, but the interviews didn't convert. Working for the government is a pretty sweet gig at every level, but also everybody else knows that too, so the competition is pretty stiff even for jobs that pay more in the private sector simply because the benefits/job security are pretty attractive.

USAJobs is a good website though, once you put in your resume info 90% of it will autofill on most applications. You will have to answer pretty repetitive questions like "What is your experience doing X? Be specific about your job title and the amount of time you spent doing it", but for those I kept a text document with a bunch of paragraphs about my work experience that I copy+pasted wherever relevant to speed up the filling out process.