If they give you a free trial without a credit card then try it.... I have also received mail about the G7 system just I do not like paying for something which I do not know if it will work or not. Though some systems promise a refund, just be wary if they give you the run around.... I had tried searching for something on them as to what people think, but I can't find anything on the system. I don't want to be a guinea pig....