In my opinion, the Ag leader system is by far the most accurate for both yield and moisture. Had one in a R72 until lost the combine in shop fire last year. I now have one combine with a field star 1 and another with field star 2. I actually find the field star 1 more accurate than the 2 but neither of them come close to the accuracy of the agleader system. When I first got the agleader I was skeptical about its accuracy,(seemed to be alot more variation in the yield than I expected), but it could predict a average yield and bushels harvested that when you were done the field was right on the exact amount in the bin. If you have a chose, hands down I would put in the Ag leader. I have been considering buying another system myself for next year.