I must agree with with overwhelming. A lot of topics and deeper, just for the extra unit. Just do it if you enjoy maths, are good at it and perhaps have a good 4-hour/week tutor, eg. Prior (albeit expensive). Conspiracy theory anyone? It reminds me of the dictation test of the now defunct white...
Just curious, how do the "mass" ( as oppose to one-one) coaching schools like North Shore and Prior work? I gather the day's topic would be chosen independent of the current assessment tasks of the students who obviously would come from different schools. How do they do it?