I bought this samsung refrigerator two years back it is working on same cooling at all modes. It is very expensive and the changing of the modes is not working properly which results in many ups and downs in requirement. The maintenance cost is also high bacause of frequent problems arising in the coolant section. And we cannot find suitable parts for this product in the market, we should place an order to company to get the equipments of this product. The refrigerator is not reliable to the cost investing. Dont buy this type of products and the service is not good they are not responding in time.