A and C:
Yes, I have flown about a 8 so far (including 2 with the CAA watching) and they have all gone very well indeed. Mind you, having used dual GPS BRNAV in my old day job for years I would not have expected anything else.
Compared to doing my first NDB in a Varsity some 45 years ago a GPS letdown is a very relaxing affair!
Although the Trials Questionnaire from Leeds University consists of 26 questions there are only a few that HAVE to be recorded by your observer whilst you are airborne.