I don't know why it is, but I leave so many putts dead center and short, just a revolution or less from going in with my Ten w/ TT. However, my Shot Scope stats make it obvious that the TT alignment aid must be working as I make more long putts and a higher percentage of putts at every distance with the Ten w/ TT. It definitely outshines both the Toulon Portland and Stroke Lab DW which I'll occasionally switch to when feel like I've been in a putting slump or just lost feel for the greens