Yeah, it's a huge risk buying these before hearing any samples or knowing who is doing the vocals. I had some points at CDJapan that needed to be spent before they expired, so why not. Just got the Rin and Kaede singles though since I have high hopes that their songs would be good. Plus I want the bonus stickers that come only in the first press.
Oh yeah, since there is no way I can play that mobile game, I'll just give the codes to anyone that wants it.