I can tell you that the hybrid gets excellent mileage if you slow down just a little. I drove a 625 mile trip and on the way there I drove 78 miles per hour and got 37 mpg and on the way back I dropped my speed to 68 and got 42 MPG. I love to drive this car in traffic, it gets around smoothly. Only complaint I have is the parking brake lever hits my leg when driving. I am over 6 feet tall and that lever gets annoying, but if you were shorter it would be fine.
The auto start feature that shuts off the engine at stop lights or just stopped will shut off the engine and when you let off the brake the engine automatically starts up and you go.
Not much to improve other than that emergency brake lever. The door unlock when you shut off vehicle only unlocks drivers door, I went through the manual and there is no way to set it up to unlock all the doors.