There are disadvantages, but the product is usable.
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As a point of reference, the photo shows, on the top, a native adapter (it was included with a Google Pixel 2 smartphone), and on the bottom, an Apple USB Type-C to mini jack 3.5 adapter that was purchased separately.
Pros
Everything is in working order, the shipping was prompt, and the package was cool.
Cons
When compared to the sound produced by the native adapter, this one is approximately twice as quiet.