I have a Holden Barina, which is called an Opel Corsa in Europe I think?
It's good. Uses very little petrol, never had any mechanical problems, cheap to insure due to it's size and power.
My only criticism would be it is a little gutless and has quite slow acceleration, but I suppose that is to be expected in small underpowered hatchbacks.
Mine is pretty basic (no power windows, sat nav, leather etc) but they sell nicer models for quite a reasonable price. I got mine second hand for $3,400 AUS with 137k kilometres (It's a 2000 model).