Of all great wine appellations, Inwood Road in Dallas is not one of them. This wine is not only the exception, it is one of the best wines from Texas.
Their Tempranillo is even better: At the winery (near upscale Industrial Blvd.) the winemaker offers tastings comparing it with 2004 Bodegas Muga Reserva from Rioja. It compares very well.
Anyone confronting themselves with giving Texas wine to (rightly) skeptical out of state relatives with a view to surprising them should look into these.