Was wondering if anyone has ever used one? Suspect bf might be seeing someone else. We have been together about 19 months, neither of us spring chickens. I have two small children 6 and 4. I love him but if he is mucking me about then I will ditch him, but trouble is I need to be sure as I don't want to throw away what we have. In a terrible state today as I can't get my suspicions out of my head. Using a PI might be the only way to get things confirmed or otherwise?