We leave the tropopause value by default to 36090 feet. Our SOP does not require to change it. Yes, it will give you better predictions and more accurate recommended and max altitude. I have played with it also and did not notice very big change; and I used 2 very different values: 20 000 feet vs 50 000 feet tropopause. From what I undestand, at the tropopause, temperature stopped to decrease so performance wise it’s better to stay below it. But surely temperature is not the only factor as many aircraft fly above it. Since we do only short/medium flights on A320 in the mid lattitude (20/30 degrees north) it’s not a big deal to leave it autotune. Maybe for the long haul skippers flying along a meridian, they are changing this value. Would be interesting to have some feedback from guys who are trained about this feature.