ADK has been around for some time. They make several grades of mics, from low cost budget mics to expensive, knocking on the doors of the big boys, mics.
In addition, ADK tends to tweak their designs incrementally as time passes. So there's a bit of confusion with all the various versions of, for example, the A-51 mic (there are probably 20 versions with the designation "A-51").
I can't speak for the budget Generis line, or for many of the less expensive "ADK" branded mics. The Audiophile Series of mics are quite nice, with attendant higher prices. I've tried all of the Audiophile Series, have owned the ADK A-48 and currently own a pair of ADK CE. The CE mics are wonderful, as are the TT and TC. The TL is a poor man's AKG 414. The Vienna and Hamburg are very good too, and inexpensive. ADK is about to release updated versions of the Vienna and Hamburg.