After 3 years, I have followed the recommended maintenance schedule and had a great experience. We bought it for the safety (side airbag curtains standard & crash test results) & reliability and have not been disappointed.
In response to the previos post, GM was bailed out by the government in March 2009 well after the 2008 Impala was designed, built and most likely sold. It is not responsible for your experience. Nor are the dealers, which are independently owned and operated.