Seems their biggest complaint is the top 3 gears are "too tall" (designed for low RPM / good fuel economy), which means frequent downshifts for extra power - eg. passing, or climbing a hill on the highway.
Normally people who choose a manual like to shift, so what's the problem? They say the shift quality is crummy:
"2012 Chevrolet Sonic is not super"
Video - 2012 Chevrolet Sonic is not superPower is good in the first three of the six gears. But the higher gears are tuned to maximize fuel economy. Sure, you expect to need to downshift in a sporty low-displacement car, but dropping two or three gears for a slight highway incline is crazy.
We enjoy driving manual-transmission cars. Downshifting would be more fun if the shifter was any good, but it isn't. Throws are long, and the shifter manages to be both rubbery and stiff.
They're fans of the Sonic's 1.8L engine with the automatic though, calling it "one of the best subcompact sedans on the market."
There's a video too.. I'll see if it embeds....
http://bcove.me/9jxbn5n2