It's subjective. They're great keyboards and I love them. As a former hoarder of IBM buckling spring keyboards, I'll take an Apple keyboard any day. And a Magic Mouse, too.

They're what I'm comfortable with and that makes them good.

As ohers said, it is a very subjective qestion. Personally, my hands start to hurt after about 15 minutes typing on a "real" keyboard.

That being said, the ergonomics of using a laptop-style keyboard is usually much better when it is external than when it is connected to a computer. The thinness of the Air might change this though, haven't tried it yet.

I actually find the Mac laptop keyboards to work pretty well (other than the crap placement of the fn key). I am not sure why, but I don't feel as great with the wireless keyboard. I thought their was no difference but it sure feels like it.

My desktop setup is a matias keyboard.

There's just no way a Mac keyboard is as good for someone who does a lot of key entry as a Unicomp or similar third party hardware.