It is known especially for its gentle, high-pitched synthesizers and an ambitiously wide array of musical instruments, many unconventional and prominent. Its use of instruments is perhaps the most remarkable and perplexing aspect of the album. The instruments used include glockenspiel, woodwinds, xylophone, flute, four different kinds of guitar, trumpet, tuba, trombone, melodica, thumb piano, clarinet, recorder, bass, and various drums and percussion including hand claps, finger snaps, and the taps of tap shoes. It also uses a variety of voices, mainly in gender and age.
In 2007, "Souvenirs" received attention for its use in a Sprint Nextel commercial.