...it "porpoised" at high speed. Sorry that was the only thing that came to mind. That being said, I'm sure someone will post all the technical stats here before too long.
The Do 335 is one of the aircraft tested and written about by the British test pilot Eric Brown in his book Wings of the Luftwaffe. Unfortunately I don't have access to the book at the moment, but it's not hard to find as a used book. I recall Eric Brown found the flight characteristics pleasant and the aircraft comfortably overpowered.