I purchased this unit on 7/20/11. After mounting the microwave it would not hold it's memory and made a very loud rumbling noise. I Called LG and they would not replace the unit; instead they recommended a repair man. The repair man replaced the cooling fan and said that nothing was wrong with the memory. I Re-mounted the unit again and it worked for 6 days and the memory wouldn't hold AGAIN! I Called LG and they REFUSED to replace this piece of GARBAGE. Again they are recommending a repair man. I have been waiting for over 3 weeks for the repair man. No repair man and LG refuses to replace the unit. Almost 2 months and still no working microwave. Never again will I purchace another LG appliance. This company cannot even stand behind it's product.