These glasses were given to me as a gift. I used them without thinking much about it until recently, when at a friend's home I experienced the Riedel Bordeaux glasses. The difference in quality and design was notable, and especially the shape of the Riedel glasses makes the wine taste better. I immediately gave away these Spiegelau glasses and bought several sets of Riedel. The Spiegelau glasses are comparatively thick and not the optimum shape. Spiegelau is better than what you'd find in Wal-Mart, but if you're going to spend money on fine wine glasses because you appreciate the wines you'll be drinking from them, I recommend you spend a bit more and spring for the Riedel.