I purchased 12.2 and so far it is good with many things including hancom office; but I think MS might release Office for Android Tablets soon; plus 12.2 inch screen really gives a better size for preparing documents, I am waiting for 360-degree case to come so I can work with in portrait mode. The only complaint I have is I can't play Asphalt 8 in High Graphic mode smoothly comparing to my note 2; the lag is too much to bare, so I had to reduce to Medium just so it gets more smooth. I really don't understand why since 12.2's specs are very high, I think that I need custom Rom for this, and the development could take a little while.
The battery is great, I can go through intensive use for more than 9hrs, and if it's normal use, it can bring up close to 12hrs.
Few people have come and commented that this thing is huge, but it does the job I need. To me, this thing can really replace my laptop, I am waiting for the USB OTG to hook more things (keyboard, mouse, external hard drive, etc.). I paid this one for $900, and I think it's high but it has 3G option so it's fine
Hope this helps, if you need to know more about this in the aspect which you are looking for in a tablet, PM me and I can check it for you.