Just got my modem working today.
It's been rock solid the whole day - 4 signal lights, sitting on top of my PC near the window. Signal strength average around 18%
As for gaming - haven't tried yet, but at the moment, I don't think it's going to work well for FPS games.
I've done a few ping tests and it times out every 3 or 4 seconds - iow latency issues. Average to saix is around 300ms.
I haven't done any tweaking tho - perhaps with an aerial and a stronger signal things would improve.
Other than that, so far, I'm very happy - I guess I'm one of the lucky folks with a good location - Blairgowrie/randburg just off Jan Smuts at the top of a rise/hill.