So far, so good.  We've noticed quite a difference in our finished basement.  I've had to empty the filled tank about twice a day.  The light on the front of the unit really helps as a "quick glance" gauge to let me know it needs to be emptied.  I would have rated a perfect 5 star for "Excellent" because we are super happy with the unit itself, but are extremely disappointed with the app.  The app was sold as part of the entire package, and the fact that it does not send PUSH notifications when the tank needs to be emptied is an inconvenience.  I do not want to have to think about opening the app to check it.  I want the app to notify me that the humidifier needs attention.  This is a pretty simple feature that most apps have.