Original Cube iWork 10 case works just fine for me, it fits nicely and supports smart cover wake/sleep without problem, and it is realtively cheap compared to iPad cases. Although I do feel the plastic is a bit thin, and will work just fine if you just want want to prevent scratch on the screen and back panel. Nowadays, I mainly just use the keyboard dock, rather than using the case.
But the shipping time from China stores is pretty long, so I’m trying to buy from amazon or maybe somewhere else. It would be awesome to know which of the available cases on the USA for other devices (Samsung, Lenovo etc) are compatible with the iwork10 in term of size so you know we all have more options 🙂
If that is the case, why not just buy a standard softcase/leather pouch while you wait for the original case. I don’t think you can use any other brand cases as the dimension is way off.