Pict_1 shows how I use it if I want to do some serious typing.
Pict_2 shows how I use it when I'm eating breakfast while reading. Also a picture frame position.
I recommend some kind of holder for a pad, because it adds to the functionality of the device.
I've noted that the size of the iPad on-screen keyboard improves the typing experience a lot(!) compared to iPhone/iPod touch. I know this may seem too obvious to mention, but there you go. But it means I don't hesitate at all before typing an email on the device.