Syncthing was a godsend when I was in college, but it was surprisingly hard to convince my peers (pun intended) that it was worth using instead of Google Drive/OneDrive. For most of them, the hangup came down to the setup process- the incumbent cloud-based file sync tools are braindead easy to use. Just log in, and boom, there are your files. Syncthing's setup process is clunky by comparison, but more importantly it's a workflow that people aren't really familiar with.
I hadn't heard of Resilio before, but their website makes it seem like a very attractive option.
In fact, their screenshots remind me of the biggest gripe I had with Syncthing back when I was using it daily in college- Syncthing doesn't let you browse a folder without downloading it. By the time I graduated, I had a good 2GB of Verilog crap sitting on my phone, just so that I could work on homework from my phone (of course, you could also blame me for putting Vivado projects in my Documents folder).
