How I Use It
I still use Dropbox to share pictures when an iOS PhotoStream will not get the job done.
I also use Dropbox when I'm just quickly trying to move a large file from one place to another.
I do not use it with my students as the user interface is not friendly for 8-9 year olds.
Dropbox is one of many cloud storage options. It is simply a way to be able to access files from any device. It works well; however I do not use it often as it is simply not as easy to use as some of the other options out there.