Personally,the focus has been failing me a little bit, lately. It's fantastic for long cruises. I drove to LAX, then anaheim, with a fair amount of city driving, and pulled off the whole 210 miles using only 6 gallons.
But usually I'm not on long cruises. I've got a a 30 mile drive out to school and back twice a week, but the rest of the time I'm putting around town all day visiting the girlfriend, going to lunch, or just driving.
Because of that, and the wonderful new sound from my Trubendz cat-back and the itch it gives me to put the pedal down, I've been doing terribly! only about 240-290 miles per tank. On better days with all this stop and go driving I average 26mpg.
"So, a dog over-steers, which is more fun than an under-steering Hyena so... you want a Mazda MX-5 because it's rear-wheel drive!"