I bought my 2008 Vibe new in December, 2007 and it is quickly approaching 30K miles (48,000 km) and I'm 9 outta 10 happy with it. I've had two warranty repairs (locked up A/C compressor and an oil leak). I like the fuel mileage and I'd give it a 10/10 if it rode a little smoother and quieter and had more power. Of course, it is what it is and I'm comparing it to my wife's Camry, which is unfair.
The Matrix/Vibe is a great little car and I think you'll find most owners are very pleased with theirs.
PlatinumVibe08