It should only take 5 or 6 hours total to teach CPR and Defibrillator. That's all the time it took for the initial course, and I also do a refresher every 2 years. A vital and useful skill. Should be refreshed every couple of years, as the recommendations for CPR seem to change about that often. It's also good for those of us with bad memory skills to have this refreshed in our minds. CPR can't hurt someone, even though you may break ribs, that person will be in a lot worse condition if you don't do it. People should be taught basic skills like these, as well as camping and survival skills. We always got such training in the Boy Scouts here in the States, but I also had a lot of tutelage from my Father. It saved my life one day.