The first V1 prototype had continued on 17 test flights without crashing, yet they all must have been at a slow speed. The test pilot found that the plane was very maneuverable.
In light of the failures of other cutting edge projects, this was not a bad introduction. The flights were enabling sorting out of the jet engine problems.
One of the odd looking Luftwaffe plane to take the blue skies was the Junkers Ju 287.