I have had this microwave for about 6 months. I bought it in part because of reviews which stated it was quiet, but from first use it was the loudest microwave I have ever owned. I thought it was just loud and decided to live with it, but now after 6 months, it flickers on and off when running. You press start and it starts cooking then the plate stops and starts, the internal light goes on and off, and the cooking starts and stops resulting in a random amount of heating- not good.  
Now I realize the initial loud sounds were abnormal and indicative of a defective unit.