Something I was missing after leaving SP2 was the ability to stick my pen to my Surface. I know I can use the pen loop, but I don't want that thing sticking out when I'm not using it, and I'm sure it will leave a mark if I decided to remove it. As far as I could tell, it was no longer possible to magnetically attach the pen, but I was doing it wrong! If you place the pen upright, it swivels, but place the pen upside down... bingo! I've kept it like this all day in the house and it sticks pretty well, although not as well as SP2. It will fall off if you shake the device, but otherwise it's pretty solid. I've walked with it without issue.