Although you can't beat the Box "deal" (with or without the 50GB extra) 'cuz it's free to start, I like Dropbox a lot better. Box does not seem to have any actual "sync" capability. You can upload anything from your PC/Laptop (or phone) to the Box, but it doesn't have a mechanism to automatically sync to said PC/Laptop/Phone nor other PC/Laptop/Phone. Dropbox is very cool. Place it once, see it many places. It automagically syncs to any and all devices where you have loaded Dropbox. Very nice. Different service, really.
-Frank
-Frank