I just started to use syncthing to sync files from mobile phone to my home server. And lost my data on mobile phone in my case. My configuration included “Downloads” folder of “send and recieve” type. When synced “Downloads” folder was deleted on server (it was my fault, another story), I created empty folder and file “.syncthing” inside it. After that Syncthing deleted all files on mobile phone in “Downloads” folder. And data was lost forever. So, it would be nice to add case in HOWTO. What to do in such cases when you have lost your folder on one of device? Google found nothing for my query. Another nice feature would be to have some sort of Trash Can for delete operations. So, I can review and accept files/folder remove.
And Web UI is nice: simple and informative.