Good wine glasses do make a difference, but my main gripe with the Riedel stemless glasses is that one's hands can't help but warm the wine. Sometimes that's desirable, but oftentimes it's not. Good stemware, including that made by Riedel and other comparable brands, allows you to choose to hold the glass by either the bowl or the stem, depending upon whether the wine itself is already at the proper temperature for optimal enjoyment.