Works for PC and Mac too.

#1, with the absence of the Mac command key and the Windows key, how usable is it? Not like the Windows key is all that useful, but I use the "clover" key on the Mac all the time.

The window's key is a must!

You can easily map the key next to the bottom left control key to be a Windows key.

I have this keyboard (paid $25 for it a month ago) but it was worth every penny. Tried a couple of cheaper off brand ones that was just problem after problem. Tried the Logitech one for the PS2, but turns out the number keys on that one was miniature size.