I can only review a wine tasting we attended in the vineyard itself, hosted by Rüdiger Kröber and…read morehis wife.
We learned about the difficulties of horticulture on such steep slopes, the benefits of slate soil and, of course, the effects of bad (wet) weather on the vintage. Harvesting wine under these conditions takes years of experience and passion, which the Kröbers, with the whole family being involved in the business, definitely possess.
The wines ranged from a sparkling wine to a sweet (white) wine - or wine from a late harvest, with the basis being the Riesling grape.
Mr. Körber is very knowledgeable, and prices range from around €6 for a Rosé wine to €30 and €50 for a sweet and ice wine respectively, with most wines being very reasonably priced.
You can order wine online, and book wine tastings at the vineyard (weather permitting) or in the cellars.
It's a beautiful part of Germany and I can only recommend visiting, especially in autumn for the harvest festivities.