Auxiliary Diesel Tank Gravity Feed vs. Electronic pump

I have a 75 Gallon Transfer Flow bed tank and love having the option of when and where to fuel up. I also appreciated only having to purchase about 7 gallons to make it through Canada coming back from AK empty. I change the filter about once a year and carry a new filter in the truck. No problems with this truck or the previous (100 gallon in bed tank on a chevy gasser(different tank)). Transfer flow is spendy but everything is certified to be on the truck.