Honestly it works great but only if you can plug it into a flush socket so the bulky plastic case doesn't prevent it from being fully inserted. The reviews saying it fails are probably the ones where it wasn't fully plugged in because it wasn't possible. I use it to get mono output from ham radio to stereo headphones. To make it work for my setup I connected it to a 3.5mm splitter I have that works fine for the radio.
Premium Fiber Optic Cable For Enhanced Audio Experience: CableDirect TOSLINK 25 Ft Audio Cable For Soundbars And Home Theaters
18 Review
High-Quality 14AWG Braided Speaker Wire (15 Feet) With Dual Gold Plated Banana Plugs - Oxygen-Free Copper (OFC) Construction For Superior Sound - Black
15 Review
GoPro HERO9 (CHDHX-901), 23.6MP, 5120x2160, 1720 mA, black
32 Review
CableDirect TOSLINK Optical Audio Cable - Short 3Ft Fiber Optic Cable For Soundbars And Home Theater Systems
25 Review