The music of FES, varying from strictly written sheet music to liberating improvisation, is 95 home-made. Streaks of music of other composers are used as inspiration, frequently arranged, adapted and integrated into FES compositions, adding a wide range of atmospheres and styles to the eclectic FES universe. FES, who dares to flirt with other disciplines as theatre and film and owns the ability to seduce a number of different audiences, from more select jazz listeners to a wild young rock public, is at its best live on stage. Toots Thielemans experienced their joy of playing, their humour and technical skill and joined them on stage during Jazz Middelheim 2003. He refers to FES as a 'a band of rebels' FES must be the most versatile and at the same time the most daring big band phenomena ever.