Ono's vocal performances have been described as avant-garde, incorporating unconventional vocal techniques, improvisation, and a departure from traditional structures and melodies. Her voice has been characterized by its raw and unpolished quality, which has been both celebrated and criticized.
It's worth noting that music appreciation is highly personal, and what one listener may find enjoyable or interesting, another may find unpleasant or challenging. Ultimately, whether one considers Yoko Ono a good singer is a matter of individual taste and perspective.