Hate to be the person to join a forum just to complain but I'm hoping my Surface Book is just a bad unit. I've seen one of the problems posted but here is the list so far after using it for 4 hours: Dell 34" U-Wide cannot be used with the dock. Screen goes black every 2-3 minutes for 10 seconds or so Cannot boot with the dock. Monitor never comes on and my Kef X300 speakers just click over and over. Have to boot without the dock, then plug the dock in Strangest problem is color temp changes on web pages as you scroll. Goes from a light white screen to a purple or yellow hue once you hit a certain point in the page, happens consistently on long pages and easy repeatable. Happens on both the external monitor and the laptop screen. Playing MPEG files on the laptop works fine, playing them connected to the dock will give an unable to decode error sometimes, program closes other times, and plays. After it errors out 2-3 times it refuses to play until reboot. Going to a web page where there are a lot of animations or movement causes a black screen, won't come back until you undock/redock Cannot detach dock, says I have to close SearchUI but its not a running service that I can find, have to reboot again After using for a while cannot run any program getting a Run32DLL error. Seriously now what I was expecting for a $2,500 investment including the dock. I got the i7 GPU model with 256gb of storage. It does so many things right too. This is the first computer I've seen where the pen is actually usable for how I would use it. Keyboard is fantastic, trackpad too. Not everything comes out of the factory as it should so maybe this is just a bad unit but the docking situation will kill it in the business market place, that has to work right.