Despeque, you should read the posts more carefully
In fact I quite agree with Despegue. He will retire as I did with a smile on his face and no arterial tension at all. The PLOG is something very useful as a basis. But the computers assume that you are going to get the flight level prepared in the flight plan and follow the track...Fly from Paris to Istambul in summer (I will assume there are no thunderstorms so as to keep it reasonable)...tell me when that did happen? The PLOG leaves you with the exact fuel required by law at your destination, assuming everything has gone according to the nice flight plan???That never satisfied me, and I never regretted taking a little more, not on a hunch, but according to experience.
I took the plog to stockholm, I took a lot more to Athens or Sofia. And I think you will agree with that. I checked everytime with the fuel cistern for the test for water in the fuel and I checked its temperature...old habits and mistrust make old aviators.