Pretty competent, up to their potential based on arms. they weren't going to be first in at any critical point. I'm not sure anybody was really confident what they might do. You have to remember that their families were almost hostages.
they were never armed up to the point where they might take a chance at going after the local Russian contingents. The further you got away from Germany the quicker the quality of the troops and armament dropped off. The Party police forces and Border Police, probably could have taken on the "Armies"
Similar to the situation, which never got past the "Oh yeah right, that's gonna work real well" stage of the proposals to arm southern slaves with the intent of them staying slaves after the war. (These proposals were starting to get floated in Feb and Mar 1865. The war ended in Apr 65.)
What would happen first surrender to the Yanks/NATO or take on the masters. The Communist Party Leaders really didn't trust their people.