I have used the Z10 for about a half an hour, and I was pretty impressed.
It wasn't in service, so I didn't get the full picture.
It feels pretty neat, as how it works with the icons, tiles, and hub.
The sliding to open, and navigation works well and makes sense. I found that they put a lot of hotkeys or items you would click in common places, like the phone and camera button on the main screen on the bottom.
I overall was really impressed that BB actually produced a device that is up to par to the iPhone 5