Though I was initially skeptical about what can achieve such a device, I ordered one anyway and was surprised. For years, I have problems with the upper back, an almost constant pressure pain in addition to the shoulder blades until the radiating part in the ribs. I do not know how many doctor and specialist visits I brought already behind me. Physiotherapy has partially helped, but it was very dependent on the Therapeuthen and also not permanent. Even Rehasport could not solve the problem .... of course I know myself that I would need a balance in my often seated Pc work, but the time for work and family to find with young children is difficult. Now that I often feel the need to gently but firmly on the trigger points on the back feel, but my wife does not like constantly bother you (your hands do you then hurt so fast :)), the Beurer MG55 knock I ordered massager. The intensity can be adjusted to a dial and can I unlock a separate infrared function ... but the intensity of the IR diode is not very strongly felt. The massage function is very well intensely felt and goes down to the depth of the muscles so that the machined surfaces by itself be warm. It helps me when I have so shake up my back and that's why I no longer give it ago.