I have had all sorts of problems with my mouse/keyboard disconnecting with the SB (i7/16/512/dGPU) and the Dock.
I have my SB hooked up to the dock, with the USB port on the dock hooked up to a Dell 3415w (this monitor also functions as a KVM switch). Then plugged into the Dell 3415w I have a USB receiver for the Microsoft Sculpt keyboard/mouse combo.
The mouse will frequently just stop working and both the mouse and keyboard will occasionally experience some very brief lag and or keys getting stuck. If I hit a key while the dock is lagging, it will spam that key indefinitely until I hit another key.
The mouse/keyboard will sometimes function on sleep/resume, but not always. And sometimes they will just stop working while the machine is up and running and I'm using it. It actually happened in the middle of writing this post!
When they stop working completely, unplugging the dock and/or USB from the dock and reconnecting them does nothing, or just gets them working again for a minute or two, and I need to reboot to get everything working properly again.
As a result, I've stopped using the dock's USB ports and just plug the Dell 3415w's USB directly into the SB. This pretty much solves all problems with the exception of the occasional USB failure, which is fixed by unplugging the USB connector and reconnecting it.
Everything else on my SB has been working great, even before the firmware updates. I've using it as my main machine since day 1 of the launch I've only experience 2 BSOD. (2 seems low for the SB, but in reality, I can only recall 1 BSOD in the past 3 years prior, so not great that it happens at all). But the dock in my opinion is kind of a disaster and needs a firmware patch ASAP.
