From: Conker | #005 ^No, the arrow keys and numpad are all mechanical.
The Macros, F-keys, and Delete/Page/Home/End keys are the only dome keys. This, numpad and arrows are mechanical. It's pretty easy to see which ones are at a glance, since the rubber ones have slightly dimmer backlighting and the macros are white.
I made a topic about it just a day or two ago when I received mine. It is amazing, I love the thing. The build quality is top notch and looks sweet.
Nothing I could honestly say that's bad about it.
Some minor nitpicks: It does have a pretty fat and stiff double usb cable if it matters (because it has a passthru usb plug which is nice though I dont use) and the wristpad could be a little larger, IMO.
If it worked with backlighting I'd have also liked to try the rubber tops the K60 comes with but I don't know if they dont work with this model or they just didn't include them.
For most people they wouldn't think twice about those things, as it feels and looks top notch.
Lets Go: Lions, Red Wings, Tigers, Pistons, and CMU!
It is very sturdy. People always joke about the IBM Model M being able to bludgeon someone, I think this keyboard could actually do it. As Conker said, the USB cable is thick, but it's also soft and nicely braided. The macro keys are recessed slightly, and the part they rest on is made of plastic instead of aluminium like the rest of the keyboard (presumably it's the same shell as the K60). The wrist rest is very comfortable, the software is decent, seems pretty much the same as my old G15 software with a nicer interface. It's supposedly 20KRO. Also, despite being a larger keyboard with the extra macro keys and such, it's dwarfed by my old G15v1, so having it on my desk saves a little space.