I have run under Household Movers Guide,Rand McNally, USA Zip, and PC Miler. The first three were always short. That is to say, the difference on my odometer, of actual miles driven, compared to what I was paid for, had a discrepancy of anywhere from 50 to 100 miles on average for every trip. PC Miler is almost always on the money with discrepancies of under 10 miles difference on average, and an occasional run where i actually got paid for more miles than showed on my odometer for that trip! I would like to know what guide you guys are running under and how it´s working for you. Please post it. I don´t know of any expediting company that pays hub miles, and few class 8 companies. Hands down the best mileage guide.