It allows compact encoding, but is less reliable for data transmission, as an error in transmitting the shift code typically makes a long part of the transmission unreadable.
ɪɾ ɐlˈaʊz kəmpˈækt ɛŋkˈoʊdɪŋ, bˌʌt ɪz lˈɛs ɹᵻlˈaɪəbəl fɔːɹ dˈeɪɾə tɹænsmˈɪʃən, æz ɐn ˈɛɹɚɹ ɪn tɹænsmˈɪɾɪŋ ðə ʃˈɪft kˈoʊd tˈɪpɪkli mˌeɪks ɐ lˈɔŋ pˈɑːɹt ʌvðə tɹænsmˈɪʃən ʌnɹˈiːdəbəl.