I bought this large cover for the night on my sofa. It is perfect for this use. It heats up quickly. In 5 minutes we are just beginning to feel the heat. A strong background it heats. Prepare to cook :) The programmer can set the heat level and the heating time. For 2 people, I think it's a fair bit in size. Only default, it smells terrible. A mixed plastic smell of oil. Rest assured, it disappears after some days. Tip: ventilate the 2 or 3 days before using it or go there at textile Febreze.