Very easy to use. I must admit that initially I was skeptical but eventually this winter that the heating pad my breast has increased significantly my milk production. The small very soft cover between the pad and the breast is very nice. Personally I used to take more milk but not while I was breastfeeding. I have seen a real difference on the flow. Only 20 seconds in the microwave and off you go. Small flat, I would have preferred a box of one pad and pay 2 times cheaper. To this day I still do not use the second.