Hi Joel, I think I'm still in mine (2 years in now) but I'm not sure how you would know for definite. I take 10 units of Lantus a day and a unit or 2 if I have a carby meal. This keeps me very steady (although I do have hypo's) and I am careful what I eat and exercise regularly etc. I suspect that it is probably the honeymoon period helping to keep me stable but as Juicy says it can suddenly kick in and send me low. Can you tell us specifically how you think it's affecting you? x