HTC rep at my store with a One. What do you want to know?
Build quality is fantastic. Screen is the nicest thing I've ever seen on a mobile device. Blinkfeed is really nice looking, especially with the classy time and weather icon up top (and The Verge is a feed!). Camera seems nice, but I'm no photographer so I wouldn't know the difference. Zoe is really easy to use. He brought the white one by. Very sharp looking, but I can see the white polycarbonate getting dirty easy. I think I'd prefer the black.
He'll be back in a while, and I can poke around at anything you want.