Experience of the QBOX2 so far:
As with the UBOX, searching online for more information of the QBOX tends to bring you to all sorts of webpages in Simplified Chinese, none of which seems helpful. Live streams buffering (or lack of) and image quality is much better than UBOX. Currently it seems that they are performing some server updates (theres a scrolling text with that info at the bottom of the screen in Chinese and English) so channels some times work, some times are off air. When not performing updates I can't recall not being able to load any Channels and I've been pretty reliant on it to stream iCable news during these protests.
The only channels I've found not to work are the Sky Sports channels......they do load but stream some Mandarin Chinese soap opera channels instead! For Premier League matches I use the BEIN Sports channel, aside it being in Arabic (I think), it streams flawlessly without any stutter.
I've installed the Netflix app on it, and god I hate the Android version of this when navigating, so I hardly use it and instead watch Netflix via my PS4 which is a much better experience.