The ability to split up the iPad's keyboard is one of my favorite lesser-known features in iOS. I don't use it all the time. But it really comes in handy when I need to rattle off an email or conjure up other large bodies of text.
Apple obviously put a lot of thought into getting the split keyboard just the right size for its tablet, and it shows. In fact, there are even some elements of the keyboard that you can't see. Did you know there are hidden keys on the iPad split keyboard?