I love number 24 for its completeness. Its form is reminiscent of many Baroque compositions, where short movements are packaged together (often alternating slow/fast tempi) to collectively make a piece that is about the same length as a long pop song.
Campagnoli utilized the variation to include many different techniques: double-stops, bass and treble voicing, fast passagework, and string crossings. I am glad the fast movements were not any longer. The single take recording was quite a challenge!