I really enjoy the live games I can watch on Sky Angel although sometimes I lose the signal. I don't think it is Sky Angel because when I lose the signal I can switch to a different channel and it is fine.
I think the SA servers have some limitations on number of users watching a given channel. I can remember times when there was a Presidential address or political national convention speech that would have a high number of viewers and Fox News would be buffering but other channels would work fine.