Picked up my Deluxe Wii U preorder from my local EB this morning.  I didn't receive any notification so I was worried that they didn't get enough stock or something.  I walked into the store and they had about a dozen other reserved packages sitting on the floor.  I guess they forgot that they were selling these or something.
Picked up Super Mario Bros U and ZombiU after jumping on and off the fence a number of times.  I will pick up Assassin's Creed at some point.  
My update process was relatively painless.  Got a few timeouts, but everything else has been pretty smooth.  Mario looks great on the tablet screen, and I find myself looking at the controller more than my TV even when I'm using the TV.
ZombiU so far is alright.  I don't like the decision to create atmosphere by throwing "dust" everywhere, but I guess I can understand why they did it.  Since I'm such a weenie, I can only play games like this in short spurts, and the tension in this game doesn't change that one bit.  The controls are a little bit off, and I have look sensitivity cranked, but it still feels a bit unresponsive.  In other words, it's a Ubisoft FPS.
The controller is surprisingly comfortable.  I really like the ergonomics, especially with regards to the triggers(boo on digital triggers).  Recessing the second trigger is something that I've been wanting on controllers for a while, and this nails that feeling.  Unfortunately, the bumps that you wrap your fingers around on the back feel a little bit awkward when you are holding both triggers at the same time.  The placement of the face buttons is a little awkward, but isn't anything to get worked up about.
I have the unit set up in my bedroom with all of my other toys.  While messing around with Mario, I had the urge to... expel some liquids, which reminded me to try out the range of the tablet.  It worked, kind of.  The bathroom is next to my bedroom, and I got a few unstable connection messages that I remedied by treating the tablet like a cellphone trying to get reception.  I don't think the walls are necessarily "thick", so I was a little bit disappointed.  Tested out a few other rooms(a bit further away) with much better results.  I haven't tested different floors yet.