I had to deliver a presentation last week. As I didn't have access to MS Office, I decided I'd do my presentation on Google docs. The interface itself is very good and I am used to it. We were told to bring our presentations on a flash drive to insert into the computer connected to the projector. This computer did have MS Office. I downloaded my presentation to .pptx format from docs just before my presentation started and found that the entire thing was garbled! I had to run elsewhere to get someone's laptop, find a wifi spot, connect to docs and load the presentation there, all while professors were waiting in the auditorium. Very embarrassing! This is a major problem with Google Docs. It doesn't play well with MS Office or the office on OSX. I should have expected this as something similar happened when I edited my CV using docs and then with MS Office last time. It totally ruined my formatting and was a headache to fix. This is just a heads up to all those out there to keep in mind to use either GDocs alone or only MS Office. Mixing = pain.