This was a few years ago, so it may no longer apply, but my biggest frustration was that none of my keyboard shortcuts worked. I like to toggle between the browser and my code editor while I code, and the only way I could do that was to physically swipe the screen with my hand. There was a workaround to enable certain shortcuts by turning on accessibility mode, but it was a huge hack and didn't work that well.
Well, if the "few years ago" might be closer to iPad 1 or iPad 2 eras, then that might have been the case.
As the other reply said...non-working shortcuts and also no mouse cursor. You have to continually lift your hand to the screen to swipe or press, or click/double click the home button (hopefully you have the iPad positioned securely or you'll have another frustration on your hands).
When I needed it there was also no splitscreen, which I acknowledge would make things easier. The situation might be better now, but my sour experience forced me to move completely away from Apple at the time.
>As the other reply said...non-working shortcuts and also no mouse cursor. You have to continually lift your hand to the screen to swipe or press, or click/double click the home button (hopefully you have the iPad positioned securely or you'll have another frustration on your hands).
Well, I don't normally use the mouse when I'm writing a document. I even prefer full screen, full focus mode in writing apps like iA Writer and Ulysses (also on the Mac).
That said, most shortcuts one would use for writing work just fine (select all, copy, paste, etc). And more from what I see here: http://www.laptopmag.com/articles/every-ipad-keyboard-shortc...
What exactly is the frustration from it? I find it perfectly fine, if not better than using a laptop for writing "simple documents".
In fact that's exactly the use case most pro writers that use an iPad use it for.