Summary The interface is easy. Turn the unit on and the digital display activates. Just add the hours and minutes you want and then press the start button. This begins the countdown until the unit shuts itself off. The whole time it stays at the proper temperature. Overall this is the perfect yogurt maker for the novice or if purchasing your first yogurt machine. It includes easy to follow directions which will help you make a perfect first batch. No need to experiment or try different recipes until you get it right. Just follow the enclosed directions and you will get a perfect first batch.