never taken them, but im vaguelly familiar with the sylabus. personally i think they're a pile of shite, merely designed to sell handbooks. the improvisation section basically involves you playing an improvised solo over a chord progression played by examiner. the idea i guess is that you use the scales/arpeggios you've been taught. so for example, if you decided to throw in some some lydian dominant, instead of 'mixolydian in two octave fingering in 3 fretboard positions' or whatever bullshit is stipulated, they'd probably frown on it. rythm section i think involves you playing a progression, from some sort of chart, in time. theres also aural tests: e.g. playing back a simple lick the examiner plays, and naming chord types that the examiner will play. also stuff regarding instrument care etc