It's guaranteed, if you use the app mindfully; if you simply go through the motions, you will gain nothing.It's guaranteed, if you use the app at least 3 times a day for several weeks. Training your brain takes time; it cannot be done overnight nor in a few days.In over 35 years of his practice, Dr. Sommers has never had a patient who did not respond favourably to his 5-step procedure. The same procedure was used in Afghanistan with NATO troops when he was stationed there a few years ago. The troops were under tremendous stress and he achieved great success with them. Talk about "field testing"...Yes, the app will change your life. Guaranteed. But you have to give it a chance.