This is a dry, strike that, bone dry, riesling. Dry, you ask? Here's what Eric Asimov had to say in NYT on the question of dry vs. sweet Riesling: "The subject now is dry German riesling, a notion that many people find confusing because they believe that riesling is inherently sweet....Yes, German rieslings can be sweet, gloriously so. These sweet wines at their best are fresh and refreshing and exhibit a thrilling tension, balance and grace unique among rieslings and white wines in general. Yet riesling can also be dry, as it has increasingly become in Germany and as most rieslings are in the rest of the world." 

Now, you are asking about this wine being 2011? Riesling is one of the white grapes that can and does age well, not indefinitely like a fine Bordeaux, but it can go years in the bottle and, as in this case, did itself proud. This wine has taken on a structure and a smoothness that did not exist in 2011.  Here's what Eric Asimov said in NYT on the subject: "Riesling also has the ability to age for decades, to make wines that are intense yet delicate and to express the intricate nuances of terroir so beloved by wine geeks, regardless of whether the wine is dry or sweet."  

And Kabinett? In essence, kabinett = reserve. The history of the term from wiki: 

The term Kabinett, also known as Cabinet, originally implied a wine of superior quality, set aside for later sale. It is essentially the German version of the wine term Reserve. The term originated with the cistercian monks at Eberbach Abbey in Rheingau, where the first recorded use of the term Cabinet occurred in 1712. The abbey's best wines were set aside to be stored in a special cellar built in 1245, and it was later known as the Cabinet cellar, orCabinet-Keller.

Before 1971, the term Cabinet or Kabinett often followed the name of the grape varietal, for example, a wine might be a "Trockenbeerenauslese Cabinet". The term is superfluous under current German wine law, although it can still be found on older bottles.[4]

In 1971, the term Kabinett was officially noted in German wine law, and it was given its current definition which applies to wines which are light and non-chaptalized. Kabinett's current definition differs greatly from its etymological implications of it being a reserve wine. Before 1971, the terms Naturwein (natural wine) or Natuerrein (naturally pure) were used in place of Kabinett. These terms designated non-chaptalized wine, where no other designations, such as Spätlese or Auslese, applied.

And finally, about the wine from the importer, Robert Walter Selections:

The region’s wine growing tradition can be traced back to Roman times. The town’s 1300 years of history are closely interwoven with that of the Order of St. John and its chapter house (manor). In the 19th century became known as a Mußbach Traminer region. In 1902, 54 vintners founded the wine club Mußbach (Mußbach Vintners’ Association). For the first time ever, the region’s vintners jointly marketed their grapes – which marked the beginning of the Mußbach vintners’ success story. Their wines have since become widely known and far beyond the region’s Recognised borders. Membership in the association that is benefited by the vintners single vineyard wines Ensuring that sufficient quantities are available in for year-round marketing.

Three cooperatives joined forces in 1968/71, forming the “WG-Weinbiet Mußbach Gimmeldingen eG”. The cooperative was named after the mountain that shelters the 554 m region, protecting it from storms and hail. As the cooperative decided to use available buildings, its grape and wine collection storage facilities are located at a different site than the bottling and sales facilities. They are, however, connected by an underground pipeline system With the merger of the cooperatives, membership numbers rose to 200 covering a total of 150 hectares of vineyards.

A highly effective organization was established in March 2002 when the neighboring Haardt vintners’ cooperative also joined the wine cooperative Weinbiet. Today, the cooperative ‘s 17 full-time and 129 part-time wine growers cultivate 300 hectares of vineyards.