First day with mine.
Still think my old Slate 5 is sexier, but I've definitely warmed to the color a lot. It has a certain je ne sais quois.
Camera is a beast. It's amazing what a slight hardware and software tweak can do. Old 5's camera was anything but unresponsive but it almost pales in comparison to this. Burst mode, better HDR results, crazy improved low light results and all the behind the scenes software stabilizing makes for a pleasantly surprising end result. No real use for Slow Mo, but it's still nifty and fun. The way bursts are handled in the camera roll is great, too.
Already spoiled by the Touch ID. Only failed me once all day. Now I'm instinctively hitting the home button, leaving my finger and bam. Putting in a passcode is already a bother. Can't wait to see how the tech and software are expanded in the years to come, too.
Beyond that it's like a 5 but without the seldom hiccups. The 5 is still crazy responsive and I never had it let me down, but this lacks even the most minor of stutters the 5 burped out here and there.
Edit: Beyond IB3, what else pushes the hardware on this thing?