Pros Auto sync (both ways)
Cons Can't handle large files reliably.
Slow upload & download speed.
Summary I tried to share a 700 Mb MP4 video file using DropBox. It seemed to upload successfully (without an error). But when I tried to play the file from the web site, I realized the last part was corrupted (not played). I also tried to download the file. The 1st attempt yielded a partial file (511Mb), 2nd attempt yielded 300 Mb, 3rd attempt yielded 130 Mb.
So, I don't think DropBox is reliable for sharing large files.