I am sure that document compatibility is near 100% when using the native apps. Everything renders as it should and that is very important for many people.
People also like to think that Office for iPad costs 99$/year. This is only true if you don't care about what this subscription really offers:
When evaluating if this subscription is valuable for you, I think you should consider all of the above items. Of course, someone could just not be interested in this subscription, and then, in this case 99$/year are a lot of money just for Office editing on the iPad. Only if you value most of the items in the subscription, then it's worth it.
- 5 licenses to install Office for Mac/PC
- Access to the latest Office version for PC and Mac
- 60 Sky minutes per month
- 20GB additional space on OneDrive
- Office for iPad in edit mode
For me it was an easy choice. I cancelled Dropbox (which costed me 8$/year), and for that money I got an Office Home Premium subscription. It offers me so much more than Dropbox alone.
Of course I would prefer to use DropBox instead of OneDrive, but as long as it works ok, then I have no problem with it.
Additionally I use OneNote for my notes, I just love its user interface and the note layout options, even if it lacks in features compared to the Windows version..
All in all, I believe that the value proposition of Microsoft is a very good one. Just try to put things into perspective.
HERESY!!! lol