I remember my Father being unhappy with the Exaktas he had in the 60's and 70's....querky solid cameras, very versatile and with a huge range of accessories, but, from day one, spending more time at the repairers than in use! Probably the same issues of indifferent factory QC as Prakticas, also from East Germany. He eventuallty switched to Rollei SL35's with West German Zeiss lenses, and never had any trouble, although they seemed lighter and more delicate than the East German products. I inherited the Rolleis and used them for several years before selling them on, still working as good as new.