I traded in my 2005 Toyota Highlander SUV V6 4WD, as its mileage was only 17 to 19. The change is dramatic in relation to gas mileage but not to the level I desired. I get average 33 MPG (2500 miles so far). EV works for few miles, but then if you need a sudden boost, mileage drops down (V6 to I4 is a big change, but not missing in this Altima). Feels like a luxury sedan.
EV, keyless drive, plenty of cup holders and nice storage.
More trunk space, quiet transition from EV to gas, fold down (w/trunk access) and adj. back seat, more back seat leg room, storage in console accessible to rear passengers, concealed storage in backseat (lift the back seat and store stuff). File/PDA/laptop storage on console, etc.