After I've often seen on television, what is so in a fruit yogurt in it (everything except fruit), I just tried this, how to make yourself yogurt. I was totally surprised at how easy this is. Fill plain yogurt in the jars and fill with one liter of UHT milk. Carefully stir and put the jars into the unit. Timer to 13 hours (bring me the best result) and the next morning to match the get-up will sound the transmission signal. Place glasses in the refrigerator and when I go to work, the glass is already cold and solid. So I can enjoy my own yogurt. Refined with fruits, cereals or nuts. I never thought that it could be so easy to make yogurt. Then I would have done it much earlier. At the device, I can only say it everything works properly and the yoghurt maker looks thanks to the stainless steel housing and the colored lids really good. Also, the LCD display makes the unit very high. Besides, I can at any time see how long my yogurt still needed. Since my machine runs at night, I can not say anything about the sounds mentioned here. But I also assume times that it simply heating the plastic tub, the cracks from time to time. But as I said, I hear not in the bedroom ;-) I can only recommend the yogurt maker, it is stylish and practical. Bon Appetite!