I actually keep up with the music of PRSK halfheartedly because I do like most of the producers they commissioned that being said I think Nightcord has more misses than any of the other units In my opinion, I like Bug, Kitty, Lower and a few of their album songs and honestly anything that has just Mizuki and Ena in it, I really don't like Kanade and Mafuyu's vocals I think they fail most of the songs they sing. As far as Nightcord Songs go though I like almost all of the original vocaloid versions of them