hi,
just received my true wireless earbuds and you can also listen to music with just the left earbud. you don’t have to have both in your ears.
ANC works well, have here an air purifier from IKEA next to me stand less than 1 meter away and at the highest level is usually unpleasantly loud. with ANC and music at medium volume I hear him no longer. But have no comparison to other ANC headphones.
From the sound rather bass-heavy as you know it from in-ear headphones compared to my HifiMan Sundara open back headphones