German Giant is a Rocambole that is prized not only for its size but for its deep rich musky, earthy garlickiness as well as a hot bite when eaten raw. German Giant is a subset of German Red (described next) that grows to very large size and that's good because you get more of a very good thing. If you like that warthy, musky strong hot flavor, German Red may be the best tasting garlic of all.
Rocamboles grow best in cold winter areas and store into mid-winter although German Giant stores longer than most Rocamboles.
It is best to also grow a long storing variety like Porcelain garlics along with Rocamboles and don't even start on the Porcelains until the Rocamboles are used up.