LOUISVILLE, Ky. — The Buick Verano sedan is a very good small Buick, based on the Chevrolet Cruze/Chevrolet Volt platform taking the well-executed Cruze to a new level of refinement. The Verano fits right into the new Buick mold of smaller, firmer cars with European design and flare, and with more interior refinement than Buicks of the preceding two or three decades.