"The Sheets" formula is flawed which results in some races figures being totally wrong and then it spreads out from there .If you want to spend that kind of money Thorograph is the best of them but you really don't need it.A good set of pace figures to go along with the form works just as good if not better and its a tenth of the price.I used T-graph for about a year and a half before reverting back to DRF + pace figures.