Wonderful to watch something European - in spirit and in the setting. It's even better to hear Romanian (and German) spoken and not yet more American English - not that I understand it but it's very refreshing and adds a real cold war touch to the whole thing.
The production quality is high, and you feel transported back to the 70s where everything seems just a little bleak and tasteless in an authentic way.
The plot is relatively simple, and sometimes the details are a tad far-fetched. It has American producers and this shows in places where the suave Europeaness gives way to some more brash action and plot vehicles.
In that sense it probably deserves only a 7, but because of the overall classic and classy feel (and because they speak Romanian) I'll give it an 8.