Disclaimer: I have no interest or affiliation with Zalto or with winemonger.com, which is thinking of importing this line. Emily Weissman of Winemonger and I have never met, but have posted on the same fora for a while, and she kindly sent me a sample set of these glasses. All she asked was my honest opinion.
So over last couple weeks I have tried an assortment of glasses from Zalto, known as the Denk'Art line (after Father Denk, an Austrian wine expert). Info and pictures here:
Overall, I quite liked the glasses. They're very light, with thin rims, and yet are dishwashable. The shapes are a bit more extreme and angular than my Speigelaus, Schott Zweisel, or Riedels -most people found them striking, but a couple didn't like.
My preference of the glasses (in order): Champagne- this is a really cool glass, a nice balance between flute and regular wine glass. Enough room for the nose to develop, but angular thin shape that shows off bubbles well. We compared side by side with flutes and white wine stems, the clear winner. When I break enough Riedels to replace, these are the ones I'm definitely ordering (if available in US). White Wine- nice shape, good aromatics, sits in hand well, good size. Dessert - very nice, if maybe a tad large for my pours, but with a bigger dessert wine probably need that for nose to develop- did well with both Sauternes and PG SGN. Bordeaux- I like the rather angular shape, good aromatics (like all of them this is dishwashable, but the Bdx and Burg glasses are too tall for my top rack) Universal- most extreme of the shapes, a pretty good stem, but polarizing for looks. Burgundy- this is the only one I don't think I'd consider buying (when I ever need stems again). I know some people love the huge bowls, but this seems ungainly. Last night I had my friend Yung try the line, his opinion (without any prompting from me) was the same " I like them all, but the Burg glass is a bit too much"
Thanks Emily for the opportunity to try these, its fun being a test pilot!