The Synology was purchased primarily to store our large collection of media files. It arrived, I inserted my hard drives, plugged it into the LAN and booted it up. I don't consider this as part of the setup for sharing.
The sharing features were then enabled with a few clicks on the appliance's locally hosted (ExtJS) web application. This step was much less work than going around to every PC in the home and office installing Dropbox.
Usage-wise, I find it to be less work to share something via my Synology than with Dropbox, particularly because A) I don't need any special software to share something from any computer in the world, B) most of the time my files arrive instantly and C) there are no limits to the size of files that I can share. When I was still using Dropbox, I'd hit that limit often enough to make it a PITA to use.
The sharing features were then enabled with a few clicks on the appliance's locally hosted (ExtJS) web application. This step was much less work than going around to every PC in the home and office installing Dropbox.
Usage-wise, I find it to be less work to share something via my Synology than with Dropbox, particularly because A) I don't need any special software to share something from any computer in the world, B) most of the time my files arrive instantly and C) there are no limits to the size of files that I can share. When I was still using Dropbox, I'd hit that limit often enough to make it a PITA to use.