First I was thinking that a Finger Trainer determines not really help me so. But I was taught. A prerequisite is, of course, that you continue to diligently his exercises on the guitar makes, otherwise brings absolutely nothing. This Finger Trainer has one the possibility of all the fingers of the left hand thumb, including training. Anyone who wants can also right Hand doing! What especially helped me is the strength of construction. My fingers are already a lot stronger when they were at the beginning. The rubber which is the use of the device in the palm of your hand, you can also connect to the other side and can thus strengthen the cornea of the fingertips. This is enormously important and enormously helpful. The use, however, you should make sure that you do not overdo the settings at the beginning of the same, because that could lead to mild pain or cramping. Please remember not at once to other Finger Trainer! Trust me with this device you do nothing wrong. First cream)