I used to own the infamous Kiev 88 TTL with a range of lenses, and while I loved the knock-off design and heft, the build quality was disastrous. The film cassettes leaked light which ruined some films, the transport would jam, and the shutter as well.
I've never been too fond of the softness of the 35mm's, the 120 photos were just that much better. But then digital happened and both lenses and sensors outgrew anything analog.