If you're still looking have a look at AllwaySync as well. A lot of useful options for syncing and can sync to cloud services as well.
I had 2 minor issues, one with bi-directional syncing when I edited music tags on both the pc and the server, trying to keep both folders identical. It sometimes messed up not keeping the latest or copying files back that I deleted on the other side. Nothing really shocking and I ditched bi-directional syncing anyways as I only tag on the server.
Another issue I had was when I made a mistake in target folder and somehow created a loop. It started syncing indefinitely and created more subfolders than Windows or any OS for that matter could handle. Took me HOURS to manually edit each folder to 1 letter names to shorten the name until eventually some Linux live boot CD would allow me to delete the folder from the disk.
What I find very useful are all the options to determine when to copy, what to do on conflict/errors/warning, and backup deleted/modified to different folders with a retention time. For instance, deleted files are kept in a _DELETED folder for 14 days on the server.