I signed up for Soberlink the day I walked into my third rehab for alcohol abuse/addiction, whatever you care to call it. The system is saving my marriage, my family, and most likely, my life. Who you determine is receiving your test results is very important. I am an engineer and 63 years old. Do not even think of cheating this device! Use it to treat your problem. It is the ultimate accountability partner and helps foster self-discipline. When you sign up and get going, your family and friends begin the journey with you! It works.