I used syncthing when it first came out on windows and it was very easy to set up so i can only assume its improved since then, and the android app is quite good. it has a large number of settings and you can make it only run when you're charging so you dong use all your batter.
In the meantime, I have checked Syncthing forums and I have found this topic: https://forum.syncthing.net/t/why-im-moving-back-to-btsync-r... It is exactly complaining about the ease of use on Windows and Android, saying there is no native GUI, etc. From this description it seems, that Syncthing is not there, yet.
There isnt a native gui, in that its in the browser but that isnt really a problem i would have said. it allows the developers to focus on a cross-platform good backend and have a crossplatform frontend without the issues that come with having that.
