whaaaat???
Huh? They appear to be windows keyboards! Are you asking how they are on pcs? Because most mac users would refuse to use a win keyboard (myself included) for a mac. And if you want to go that way anyway, why this keyboard... there are a million windows keyboards out there. Weird. Now, if you had a Mac keyboard to evaluate - that would be interesting! But windows??? Strange. Besides, I can see it doesn't have any extra USB inputs, which right off the bat loses interest for me... lets say I want an external keyboard for my iBook (you mentioned iBook/PB in your post), well, that would eat up one of my USB outlets on the iBook, and I'd want it back through the keyboard. For example, the Macally IceKey is sweet.
P.S. Also would be nice if you included a linky in your post. Most folks will not be interested in googling for something you mention. You want opinions, provide the link, that's not too much to ask.