I know this is an old post, but many are still running R500's (like myself) and I can DEFINITELY say that I get much better and more stable performance using the Standalong AP firmware (I believe it's a 100.******* version. But I used the Unleashed firmware on my SINGLE R500 for a few weeks and found the connection was pretty wonky, I appeared to be losing connections in the middle of file transfers, SSH sessions, remote support sessions (TeamViewer, AnyDesk) and most of those issues have subsided since I reset the AP and flashed the Standalone AP firmware.