Having Microsoft finally release Office on ipad does make things some what simpler but creates issues of its own. I use Dropbox to sync between iPad, iPhone, imac, and occasionally old windows laptop if in a pinch. One of. The main reasons for is my studies and annotating PDFs via preview on the mac and iAnnotate on ipad. Keeping it all sync'd helps keep me organised. I also use is to back up documents and images in the cloud and did fork out for some extra storage. The main problems now is that office for ipad utilises onedrive/skydrive which I have from using hotmail back in the day. I want to be able ideally use only one or have them sync between each other. Is this possible?