I've owned my Aveo for about 2 years. On the highway it gets excellent MPG (avg. 33-36 w/A/C). Decent MPG in the city. In my opinion, the engine is underpowered and highway acceleration can be scary. The car feels very light, which is very evident when driving over 65mph. Exterior feels cheap and dents very easily. It did, however, get very good crash test ratings. Overall, this is a good inexpensive car. It's unbelievably reliable, even in subzero temps. Do not try driving this thing on snowy roads.
Good MPG, great stereo, very roomy for a small car (plenty of head room)
Needs a more powerful engine and thicker outer shell