I finally broke down a got mine a couple months ago when they had the white version with Quantum Break for $300, but I have to wonder if I should have waited for the S model instead. First console I've had brand new since the NES that my mom bought me, every other console I have has been used since then.
I don't like the interface. I prefer the 360's dashboard over the XBONE or PS3. It's faster, smoother and I know where everything is. I never even knew that the button on the left was for pairing (I don't remember seeing any mention of it in the documentation that came with my XBONE) until I saw mention of it here; my controller connected immediately and the console starts up a few seconds after the controller does.
Watch your hard drive space. Master Chief Collection is one of the bigger ones at over 60 GB installed IIRC but Quantum Break is still the king with the optional 75 GB of video. With the core version of Win10 and whatever else taking up a huge chunk of hard drive space, you may find yourself running low after installing only a handful of games.