Edit: Just watched Android Authority's review and am unimpressed. Hancom offers far more functionality than the office mobile apps.
At least with hancom you have the ability to insert and manipulate images.
I installed it on my Galaxy Note 2 but it seems that it cannot open files stored in the phone. It seems that we have to store the files in OneDrive first. Can anybody else confirm this? It seems to be inconvenience. Anybody tried OneDrive? Is Microsoft trying to make us use this service?