title: Should I use thin or unicorn on Heroku Cedar
body: <p>I recently 'upgraded' my app to the cedar platform on Heroku.  By default, I am using <code>thin</code> as a web server.  But I have always been tempted to use <code>unicorn</code> for concurrency and having my dyno dollar go father.  But I worry there are some gotchas in using something other than Thin.</p>
  
  <p>Does anyone have real-life experience with this decision?</p>
  
  <hr>
  
  <p>Notes:</p>
  
  <ul>
  <li>This was the article that got me excited about the idea: <a href="http://michaelvanrooijen.com/articles/2011/06/01-more-concurrency-on-a-single-heroku-dyno-with-the-new-celadon-cedar-stack/" rel="nofollow noreferrer">http://michaelvanrooijen.com/articles/2011/06/01-more-concurrency-on-a-single-heroku-dyno-with-the-new-celadon-cedar-stack/</a> </li>
  <li>I know every app is different, and that you should build a staging env and try it for yourself.  But if it looks great in your staging env, are they any pitfalls that we should know about?</li>
  </ul>
  
  <p>I want to know reasons why everyone shouldn't do this</p>