The livestreaming works, when theres nothing on it will throw a script failed though. Haven´t looked in to why. The archive stuff isn´t implemented so no use there. The quality of the streams is average meaning SDish, but theres no buffering and it works every time.
I used the Supersport addon many times last season when I couldn't find The European Champions (Chelsea ) games elsewhere,
it works very well but the picture quality is only so so and I'd also advise anyone using it to disable it when you don't want to watch something.
it has an annoying live stream monitor which pops up all the time even when its disabled in the addon settings.