Finished unpacking and setting up my Wuu (black 32GB version) a short while ago and played a little bit of Super MariU just to see what it'd feel like.
The whole package is quite hefty, weight-wise. Surprisingly so actually. Of course, there's a LOT of cardboard stuffed into that box, and the console wuu itself has a lot of metal shielding inside of it, which makes it weigh quite a bit actually despite the weak-ass hardware it contains. The wuublet is, as others have reported, not very heavy, but its wide girth makes it uncomfortable to hold with just one hand (lever effect), so using it with the stylus is going to be problematic unless supporting the thing against one's legs.
Setting up the console goes through quite a lot of steps. There's no option to set time and date from an internet server (BOOOO!), and initial setup mentions nothing about the Nintendo ID you need to do...whatever the hell it was in Super MariU. That came as a bit of a surprise when I started the game and it asked if I wanted mmmblaha? Ok, I said. No, no mmmblaha for you without Nintendo ID!, the game said. OK I said, fuck it then, just let me play the game! Ok, the game said. Now watch this silly intro of Princess Peach getting kidnapped for the millionth time (SERIOUSLY Nintendo... This is getting so old it's way beyond cliche, parody of itself and anything similar.) Oh well. It's Super Mario, maybe I'm expecting too much of it...
The fan is very slightly audible. The disc drive is much more so, especially as the disc keeps spinning as long as it's still in the drive, even if you're just staring at the system update screen (which is downloading veeeery slowly...) The disc spinning thing really ought to be fixed. It was friggin' annoying with the 360, and while the Wuu drive isn't anywhere as noisy as that unbalanced centrifuge that was early-model 360s it's still irritatingly loud. A lot more audible than Wii was, and that drive wasn't totally silent either.
The wuublet screen seems decent enough quality, there's no discernible color shifting from tilting the thing, so it can't be TN matrix. There's quite a bit of brightness shift, but this isn't as big a problem as color shift would have been. The touchscreen functionality is not very precise when using a finger though, tapping works well enough but dragging a scrollbar is rather jittery and twitchy. Nintendo needs to add some interpolation to its touchscreen input routines methinks. The stylus is better, but still not exactly awesome.
The Pro controller is reportedly in very short supply, and more are unlikely to arrive before christmas. I have good relations with the staff at the Game store where I bought the console however, so I managed to snag one. There's a USB charging cable included, which I did not expect. Will investigate if it works with the wuublet, but considering that the wuublet PSU is 1.6 amps and USB is specced at 0.5A makes me not terribly hopeful it will work. Or at least not work well; charging would likely take many more hours than when using the PSU if Nintendo isn't supplying more current through the USB socket when a wuublet is connected...
Right now my wuublet is charging using the PSU (it had almost no power in its battery as-delivered) so I can't check. I want to do a proper first, initial charge while it's still new.