Retroshare has awful usability. I am a smart person (yeah yeah), a programmer and a hacker and I ended up with two and a half accounts. Between two machines in the same local network it transferred files with 15 Kilobytes/s. I had to find random posts online to figure out if a blue non-descript icon meant I was sharing files with the world or no-one or if it was the green icon or something else. It looked so promising but turned out unusable.