I've thought about it. Right now I live on the very fringe of the beta program, latitude-wise, and there are questions of latency which could impact certain stuff I do. Recent reviews indicate this as-yet-incomplete system can be flaky and the available beta equipment is a kludge. We'll see how it develops.
The service I have has been adequate. Only really large downloads (like MacOS updates) get to be annoying. Of course, if I were to be updating the entirety of my FF subscription (all US + Canada) every time this would also become a problem.