I have an ActionTech wireless system from BestBuy.
Worked great when i tried it out, so I revamped my entire audio/video system to incorporate it.... new TV in the bedroom, replaced TV overhead in front, added another TV midway, and new sound all over.
But guess what? The Actiontech system failed soon after all that. Went thru a hassle but got it all replaced.
And then? It is now intermittent, works when it wants to.
It's all coming out, and I'm going back to the wired-route as DavL mentioned.
I hope you have better luck.