I've purchased a few of them this year. So far, I haven't had a broadcast that didn't work or was interrupted. In years past I have had trouble, but the company was very quick to return my money in those cases. The only issue I've had this year is that they don't exactly start the streaming "on-time," so I'll miss the first couple of minutes of the game waiting for the link to purchase and then enter payment information. The broadcast is the local Mankato crew from Bethany Lutheren College in town--I believe the same broadcast that is ran on the local cable co.
It is a VERY low resolution broadcast via B2, so if you are looking for even SD TV quality, you will be dissappointed. I've loaded it up on my 42" LCD TV at full screen mode and it isn't terrible--just slightly worse than a Center Ice SD TV broadcast that I'm stuck with most times (or Gopher games broadcast in SD TV on FSN). It is hard to follow the puck at times, but it hasn't been a choppy feed by any means and the audio is decent.
If you do purchase the game, I recommend closing the embedded browser broadcast in which it first launches; then, use the reconnect instructions they send in email with the purchase confirmation to view. That launches it in the full Windows Media Player client. So yeah, you'll have to use MS Windows to view, too (unless you have a Linux hack/player that plays Windows media--it might be out there, I'm not sure?).