I've just paid for the 24h ticket so I've got it in time. At the moment it looks very watchable with not buffering (they recommend 2.5 MB connection, I've got 50). The sound just seems to be slightly off. It sounds like there's two different commentator sources.
I tried to attach a screenshot but it exceeds the limit for attachments. I'll report back tomorrow on how it went. I'm sure the servers will be a lot more used than at the moment.