Philosophically I dislike the idea of systemd, primarily because it seems to be growing more and more. (Gaining the ability to launch machines, run DNS, etc)

But practically? The service-files are a pleasure to write, the documentation is excellent, and I've not personally had a failure I could attribute to systemd. (Though I did come close, learning that systems with an old version of "snoopy" installed wouldn't boot under systemd.)