This is a much cheaper hybrid system that could be on many cars.
But there is ZERO point to buying one of these, at least on the consumer's end.
The 2009 Chevy Malibu Hybrid had an MSRP of $25,555. Aside from the hybrid system, it featured exactly ONE additional option compared to the base-model LS -- auto climate control. It was rated at 26/34mpg. At 15K miles/year and $3/gallon, this car would cost you $1500/year in fuel assuming 30mpg mixed driving.
The 2009 Malibu LS had an MSRP of $21,605. So you are paying $3905 more for auto climate control. It was rated at 22/30mpg. At 15k miles/year and $3/gallon, this car would cost you $1730.77/year in fuel assuming 26mpg mixed driving.
Difference in yearly fuel costs: $230.77. At this rate, it would take roughly 17 YEARS for the fuel savings to make up the price difference between the two models.
Since the Buick is an entry-luxury model, I expect its price variations to be even worse, making it further unjustified. Mild hybrids are a tremendous waste of cash.