We are absolutely aware, we don't like the "Do Not Disturb" function. It automatically comes back on in the morning and you can't set a timer. This is in response to our dislike of the DND switch.
Hush looks great if you're using the Pomodoro technique. You don't have to remember to re-show notifications - they just reappear when it's break time.
http://cl.ly/image/1u0S0H330v1D