Out of the options they provided, I haven't used packet or gsconnect, but the others I have had many problems with. I'm convinced my ISP absolutely hates these programs because I've pretty much never had any luck with using them to send stuff to and from my phone.

Hell, I consider it a miracle that I can even connect my laptop and desktop using Synchthing. Though that's the one I have had the most success with in the past, so I'm not that surprised.