About a week ago we took delivery of a 2013 Chevy Sonic, LTZ hatchback, automatic. If anyone is interested, I'll post some thoughts on it in detail.
As for now, for what we expected it to be, we like it. It has been a while since we last drove around in a sub-compact, so there is some getting used to.
After another couple days, I'll post more thoughts. One thing I can say is after a couple tests (albiet with less than 1000 miles on it) it looks to be getting 38mpg on the highway (round trip, speed at or near 65) and when resetting the trip computer (and verifying accuracy with a half tank calcuating by hand) we are getting just a fraction over 30mpg in 80% urban, 20% highway conditions.
The car is not fast, but it feels "quick" for its size. With the turbo though, there is about a quarter to half second delay from the time you put the pedal down until the vigorous acceleration.