Meh, my question was more to do with their administration.
The worst one in my experience is ringing up and asking for a change of sitting date/time, then not being informed that the change is not available until after the original sitting, and being required to pay a new exam fee to sit the same exam! Their reason for not offering the exam for free/at a reduced price was that they "can't give exams away for free". I wasn't asking for an exam for free, I just wanted to change the time of the original, and I would have been happy to pay a transfer fee!
My other one was back in the day of PPL nav. The chart they provided was so distorted that the grid lines were noticably curved, with white areas in the corners of the chart, where the image had been distorted away. Try measuring an angle off a curved line with a square protractor accurately!
Great job ASL...
