At first I got mine for the coolness factor. It is a hybrid, so why not have a dash board that proves it????
At first I knew nothing about "hypermiling". But with just the energy flow screen, I was getting about EPA ( 35-36 MPG ) from the start.
While not very impressive visually, and quite small in size, the battery charge icon is my most useful tool in the city.
You really don't need the hybrid display if you do mostly highway.
In the city, the Hybrid display 'probably' gives me the advantage to get +5 to +10 MPG over EPA numbers.
It is a rare day that I get LOWER than 46 MPG on my city commute in mild weather.
But with cold starts, short trips, hot summers, cold winters, and A/C use, well, you can see my lifetime average below.