The ones I have had, have been pretty good cameras, the biggest problem with them was the film advance gears, they were made of brass, and could be stripped if not careful, I always found the lenses to be pretty good, the 65mm I had, could flare if you were not careful, but were always good sharp and contrasty, esentually they are very simular to the Pentacon cameras, which was the staple of the industry in Germany and eastern Europe for a longtime, the current Kievs are based on this time proven design of camera, and a great many still shoot them as it is a lower cost way to get into Medium Format photography, the various acc. are very inexpensive for them, and also a great many of the lenses were made by Zeiss and sold under many different names. Like I said, they are a good camera once you find their little idiosincries out that they have, I would not hesitate to use one to this day.
Dave