Way better for entry. Before I was limited to writing one liners for email (twitter was just fine), but I definately wasn't going to pound out anything more complicated. But now, I'm jamming right along.
Now, I wish the think outside keyboard had a backlight. Trying to type in the dark doesn't quite work. Interesting note, the TO seems to pick up on the mode of operation of the host device. On the Treo, it was press shift first, then the letter (which matches how the regular keyboard works). But on the Nokia, its just hold down the shift while typing.