This looks to use the US BD, which isn't very good. I compared releases and D-Z0N3 and Afro are far better for video quality.
REVO is also good, but they degrained. If you like your anime clean, they're for you, because they did a very good job. I prefer it with grain, though.
I'll seed the Afro torrent on Nyaa for a while to see if we can bring it back to life. Its tracker is down, but DHT is active.