There's a MB thread about GCL where everybody reports issues. I tend to ignore problems on systems I don't run, but I believe PS3 has been one of the bigger problems.
FWIW, I've tested it on my ipad and iphone and they both seem to work fine. But so far (and probably forever), I only watch the games via a web browser and an HDMI cable to the TV. I've watched live, I've watched archived, and I've watched a game right after it ended. All scenarios worked fine although the archive sucks in that it shows you how long the game took which pretty much tells you if it went OT or SO. But I've never had a problem making it work, going that route. Is there a "knock on wood" emoticon?