With http://deis.io/ we tried GitFlow as well as HubFlow (http://datasift.github.io/gitflow/) which adds better GitHub integration.

After a few release cycles, we decided to switch back to simple feature branches with a master that is always deployable.. modeled after GitHub's workflow: http://scottchacon.com/2011/08/31/github-flow.html

We found GitFlow's benefits weren't enough to compensate for the added complexity and subpar GitHub integration.