The Sanitas SWB 50 Wärmeunterbett is quite easy to use. The cable is a little short, but with an appropriate extension cord that is no longer a problem. I use it under the towel on my massage table. I tested all three heat settings and even find it at level 2 (very chubby, I dozed off) and 1 already very warm. They can not be felt, on the contrary, it cushions the reclining surface even something on. Level 3 is well suited for frostbite. My clients are happy, I therefore also. Although it takes some time to warm up, but for this price, this product is just great: simple, very wide, uncomplicated, even washable and inexpensive.