My 2000 Mitsubishi Diamante has been extremely reliable and fun to drive. I've always liked the styling of the Diamantes, and you get a really nice car for a reasonable price. The only disadvantages I've observed are their poor resale value, and some components could be of higher quality. For example, I was told at 38,000 miles that my struts were going to need to be replaced soon. (However, I haven't replaced them, and it still rides fine.) The other quality issues were more cosmetic in nature, like a trim piece that peeled.
Nice acceleration, good styling, good value
Higher quality struts, better paint, and marketing in such a way that the resale prices are higher.