It's been a few months since I tried it, but I managed to get it into a state where it couldn't find a peer on my LAN via autodiscovery.

The Android client can't back up many folders on Android 5+ where Resilio can - I get write/permission errors despite having granted the app Storage permissions.

The Android client is a thin wrapper around the web UI, but doesn't expose all of the options / status messages.

I should do a side by side comparison.

Mine has permanent errors for a bunch of folders and keeps disconnecting from a local peer on LAN. I gave up on it within a week.

Still looking for something I can use like AirDrop but Mac<->Windows