This keyboard is almost identical to the Logitech diNovo Keyboard for Notebooks, except for the addition of an Apple key in place of the Windows key and a few other small adjustments, so you might want to start with our review.  Interestingly, Logitech seems to be marketing the PC version of this keyboard at laptop users, but this Mac version seems to be aimed at desktop computers.

The two keyboards are identical except for the Mac-specific key layout. The keys are overall supple and silent, except for the space bar, which is noisier than the other keys, as is often the case.  The amount of noise it produces depends on how you type: if you're used to a laptop and type fairly lightly, you'll only hear a gentle spring, but if you're used to typing harder, the sound is closer to a loud mechanical click.

If you've always used the original desktop Mac keyboard with its bulky hard keys, you might find yourself typing a little more discreet, apart from the space bar. Your fingers will be grateful too …