Got the XPS 13 today. One can't appreciate the small size of this thing until you hold it in your hands. It's like holding an 11" laptop but having the 13" screen. The tiny screen border makes a huge difference. The screen is fantastic. I don't see anything wrong with it.
My only initial complaint is the keyboard backlighting. The number 7 key is like GONDOR CALLS FOR AID! The rest of the keys are fairly evenly lit, with a few here and there with different levels. This compares to my retina Macbook Pro that has perfect backlighting.
One of the first things it asked me was if I wanted to upgrade to Windows 10. I said yes and it immediately downloaded it and began the installation, which is what it's doing right now.