Unboxing was a breeze. After opening the box, all the pieces are there. The USB cable was hidden in the box, so make sure you have everything before disposing of it.
Make sure you've got all the pieces before you discard the box.
TL;DR - You can seamlessly switch between wired and wireless modes on multiple PCs.
With the MicroUSB on the controller, you can wire your Steam Controller to another machine (say a laptop). It will connect automatically to the wired device, then when you unplug it, it turns off, and you can reconnect to the wireless dongle by turning the controller on again. For someone who may be switching back and forth between a Steam link and a laptop/desktop this is huge. For me, I'm just switching between my desktop and laptop.
The latest Steam Client Beta included startup sounds and shutdown sounds.
The Steam controller looks a lot like the Xbox controllers.
I haven't found a game yet that doesn't work to at least being 'playable' with less than 5 minutes of config, if any time spent on config. Unlike most profilers, this lets you name the actions assigned to each button.. Most of the templates are easy to modify, and the UI couldn't be more straightforward.
I'll start posting videos of the games that I've setup with this. Most of them work with a quick community profile load, and others will just work with the templates provided, but others take a little work, but it's well worth it to play half life 2 on the couch.
Thanks for reading!
Stay tuned for more on the Steam Controller.