I just received the iPad keyboard dock today. I’ll be getting the official cover for iPad by Apple soon.
In fact, I am typing this post using the keyboard. The keyboard itself is very quiet, same feature as the regular keyboard from Apple. It also have a couple of extra keys for screen brightness, sound volume, lock screen, search, home, etc. I can also charge my iPad through the dock. The dock has an line out for external speakers.
The only thing I don’t like about the dock is that I can only dock the iPad portrait. Any covers you have need to be taken out. The dock is pretty bulky (not foldable) to carry around. It will be a better combination to get the Apple iPad Case with the wireless bluetooth keyboard.