I'm at a small startup (about 8 engineers) and for the most part Heroku has been a great solution for a team of our size.

However, the recent github incident was a major PITA for us, and has us seriously considering leaving the platform for the first time. We're still working on getting all of our automated deployments back up and running.

In addition, we had just put in some work to start using the Review Apps feature, which now seems to be gone for the foreseeable future.