[Peter7307]

Sold here as the Holden Astra (Holden is the local division of GM) they have a good reputation for reliability and FE.
My niece has the earlier version and gets about 9.0 / 8.0 in city / urban running and about 6.5 / 7.0 on the highway in the auto version.
She doesn't drive for economy but she is a fairly conservative driver none the less.
No idea how they go for modding for better FE if that is of interest.

Nearly forgot...she bought hers used with 80 000 kms on it and it has just gone past 230 000 kms with no problems so far.

The only complain is the a/c struggles in the Australian summer with ambient temps of 40 C. The car is black inside and out with leather seats.
May not be a problem where you are.

Get the service history and especially the cam drive belt.
Not a weak point but not cheap to replace and some owners skip it in the service schedule.
The other thing to check is the IAC (Idle Air Control valve).
They can stick and stalling engines is the result. A clean out is all that is needed but some dealers replace it instead since it is quicker for them but more expensive for you.

Cheers , Pete.