I'm not going to beat around the bush here - having online storage is the BOMB. It's just a shame you can't be logged in to multiple Dropbox account at a time... but not with Shift.
Productivity apps are diverse in both design and use, but since there are so many to choose from, it can be overwhelming.
But are they more hype than help? And is it worth your time to research each and every one before jumping in?