Song 4 u, I feel is too short. I would've liked a good outro to match the awesome intro of the song. And the PV doesn't look very promising to me...
Missing, I also feel that 4:09 is "missing" something. Overall, this is the most old-fashioned sounding Ayu song in some time, and I love it.
Melody, the mixing sounds a little off to me. But I feel like this is something from GUILTY era. It's nice to hear Ayu do something that's actually her kind of style of rock.
Song 4 u's Orchestra Remix is pretty decent. I like the change of vibe yet that it still has the heart of the original song in there.
I do not like the SHINICHI OSAWA remix.
I liked the Remo-con mix, because it's something I generally would expect from a-yu-trance.
I can't even describe how bad the Missing and Melody remixes are. Waaay overboard with the glitchy crap.
And I just want to mention that it's nice to hear the instrumentals of everything. You can hear the production quality a lot in the songs by listening to the instrumentals.
