I have 3 Macs; one at work, one at home and one to carry when I travel. Also I have an iPhone and an iPad. I use Dropbox to sync my documents and my downloads folder. My downloads folder is organized and I don't carry a lot of junk; only the most recent programs, updates etc. That way all my machines have the same files in the same spot. Dropbox does something that the old MobileMe did and apparently the new iCloud dropped, that is the iDisk. I like to be able to carry my MS Office documents and have access to them from all my devices. Aside from pictures and music, iCloud only allows Apple specific files (iLife) to be stored in the cloud. Dropbox allows me to put any file in the cloud, be it Excel, Word, Autocad, DMG or whatever. So, unless Apple restores the iDisk functionality to the iCloud, Dropbox or an equivalent service is a must. It works in the background very nicely and allows you to select what to sync and what to keep in the cloud without syncing. Those are the pros. Cons? You are limited to 2Gb free space initially, however you can increase it up to 16Gb by referring friends.