I use Dropbox daily and I love it. As a part of my current setup, I sync the entirety of my Dropbox folder to my Synology NAS device, in order to have all of my data available to me locally, through LAN (my laptop doesn't have enough disk space to allow for that), and to be able to copy the Dropbox data elsewhere to serve as a backup.
Right now, I'm using Synology's official application - Cloud Sync - to retrieve the Dropbox data. I believe it works quite well (it has some drawbacks), but it would NEVER be as reliable as an official app. Since the OS that powers Synology units - DSM - is Linux-based, I hope this suggestions is not too much, as there's already an official Dropbox Linux client.