My company has the X-Plan with Ford so the pricing was only slightly above true employee pricing. No haggling. I can't speak for kid stuff since we have no kids but it's certainly a decent-sized trunk, nearly comparable to the Regal's.
So she had a Buick Regal, and liked the Fusion best? That's not surprising--probably the Regal resembled the Fusion in some ways--a good-sized sedan. My wife drove a Honda Civic for years, and liked the Fit and the Insight. Did not like the Prius (too big!). She likes her Insight--it drives like a Civic, she trusts Honda's reliability, and she's short, so she doesn't like bigger cars and the Insight "fits."