I bought it once the Oled came out.

Works on my Beamer, 3 different TVs and a Capture card. Haven used Displayport on it yet.

I use the adapter and it just works. I haven’t removed the adapter from the dock since I got it and the adapter also works with my android tablet, but only without the tablet case. But since it works without the adapter then the adapter is probably broken. Check for bent pins.

For me it depends on the headphones. Its not the best sound with my iems, but with my headphones there are no issues.

Fanatical is also good for bundles. And before buying anything I always check isthereanydeal, but you need to specify that you are looking for steam games on there.