title: Is ZeroMQ production ready?
body: <p>What are your experiences with ZeroMQ as a general purpose messaging middleware?</p>
  
  <ol>
  <li>Did you run into any show-stopping bugs or non-obvious "features"? E.g. 2.0 was not flushing messages properly, and <a href="http://zguide.zeromq.org/chapter:all#toc14" rel="noreferrer">the troubleshooting guide</a> seems to give the most terrifying workaround of them all: "<code>sleep(1)</code> before exit".</li>
  <li>Did the API reduce complexity of applications or did it prove to be troublesome?</li>
  <li>Is backwards compatibility often broken?</li>
  </ol>