There are some quirks to the way the apple bluetooth keyboard works with the iPad. Most of the keys work as you might expect and the pairing system works just fine. There is no real way to navigate around applications and the system that I have found using the a keyboard though so I find myself switching back and forth between screen and keyboard.
The dock is quite vertical which can make the screen position a little off if your are tall and working on a normal desk and chair.
This setup is not what the designers were originally thinking when they created the device but for typing blogs, email etc with my large hands using a keyboard is a lot quicker and easier.