FX Pichler is absolutely one of the top producers in Austria. Their house style seems to be more towards wines of depth and concentration, and the "M" bottling is a Smaragd (later harvest) wine that proves itself to be one of the top bottles of spicy Gruner Veltliner made.
It is not often that one can talk about the greatest producer in a given country, and while there are many great wine-makers in Austria, none is more synonymous with great Austrian wine than F.X. Pichler, or as he is simply called, F.X. In fact so riveting is his reputation that one author on Austrian wine who was prompted to list the 100 greatest producers in Austria, in order of greatness, lists F.X. Pichler as #1. When one tastes the wines, you’ll see why they impress all. They are truly monumental dry white wines – each with a mouth-filling presence, finish and complexity that leaves one speechless. His Riesling Smaragd Loibnerberg is the quintessence of rich, exotic multi-layered Riesling. His Gruner Smaragd Kellerberg and Gruner “M” are the most rich and complex expression of this unique varietal one can attain.