My only problem with the GNU episode was the audio was rather quiet.
As for the episode itself, it was a typical pilot episode. It didn't really grab me, but I'll say I'm at least interested. They didn't really explain anything, but at least it gives us something to look forward to. After seeing it briefly in the OP, I would have been really disappointed if they didn't show Sumire going into berserker mode.
It's a goth loli show where the lead has an eyepatch. Kinda hard for me to not watch at least for a while.