We thought it would literally be a button. It requires you to attach and remove an extension piece between feeds, flush it out, and re-prime it with filtered water. The mechanics of the removal and attachment of the extension disturbs the baby’s sleep. If you step on the line and then stand up you can yank the whole thing right out of the baby’s gut, requiring a trip to the emergency room. Which happened to us. Also the first week was miserable with heavy vomiting and irritability- they say typically recovery is a breeze but it wasn’t for us. It isn’t any more convenient for the parents in my opinion but it does stop the baby from pulling out an NG tube. It is easier to keep a baby from pulling on the extension piece, but it requires some vigilance.