I tried it at the Apple store, and it seemed just fine to me. Of course, YMMV under prolonged use.
One thing that occurred to me, as I played with the 11 inch and 12.9 inch iPads, was that the larger screen on the 12.9 inch is a mixed blessing. In addition to the obvious trade-offs of portability and cost for more screen real estate, there is the ergonomic consideration....which is very individual. A larger screen and physical keyboard means that your hand has to take larger excursions to reach content on the iPad. iOS is a touch first UI. So, you are constantly moving your hand around from keyboard to different parts of the screen. With a smaller screen and more compact keyboard, the excursions are less. Of course, in the extreme, it can become too cramped and small for practical use. But, I don't think this is an issue for the 11inch iPad with ASK.