We have been using DropBox for years. Suzanne is an avid advocate of the product. Initially I didn't like it due to the "growl" feature that would flash up an on screen notification alerting me to changes within DropBox - such as a new or edited file that Suzanne had added. Unfortunately those alerts would often interrupt a ScreenCast - meaning I had to scrap it and start over. Once we figured out how to disable "growl" I became a big fan as well. There are competing products out there - but DropBox remains our Five Star choice!