To give an idea of just one of the 'peculiarities' - The flaps. It has been commented on regularly in testing, and will probably be one of the more common questions upon release so a brief description of their effect may help:
Simple two position (up or down) flaps, primarily used for drag rather than lift. They do add a lot of drag, "Of interest the Fleet Air Arm and FRADU always raised the flaps during a roller, unlike the RAF who always left them down".
They have a strong pitching effect, which is commented on in the Pilots' Notes. Also, "When flaps are selected down you would pause a second or two then start trimming fully nose down. This would more or less balance out the change in trim force. However you would run out of trim before the flaps had finished travelling with the last 5 seconds or so developing a small push force to prevent the nose rising. This push would gradually decrease as speed reduced."
Both quotes are from a high-houred Canberra pilot who has been a great help in creating the 'feel' of the aircraft. I suspect it's the effect mentioned in that second quotation which may attract comment!