It is an immeasurable improvement from the brand's most recent mid-sized sedan, called the L-Series, which was such a dud that GM just stopped making them in 2004, with no replacement on hand.

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In contrast to many rivals, Ms Winfrey has made self-improvement a part of her brand.

ECONOMIST: Dumbing up

Home improvement chain Lowe's, for example, now offers two home automation sets under the Iris brand.

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