It's a good product for splitting stereo audio. My use case is having a single stereo output split between two headphones (digital piano output for two listeners, where one is playing and one is recording vocals, hence why speakers are not an option).
I appreciate the included thomann cable velcro. If using with headphones and this adaptor is hanging from a port, the two ports can cause a lot of "click-clack" sounds as they swing around, so it's important to fix them somewhere or have them on the floor to prevent this.
Only minor feedback:
It would be nice if it came with a 6.3mm jack adapter included, maybe as a bundle.