Ok, finished listening it right now, and for me it's a good album. Song 4 u, Missing and Melody are nice and so are their instrumentals.
About the remixes, I LOVED the You & Me ones, they're far better than the original. The orchestra version for Song 4 u is lovely
and the remixes for Missing and Melody are unlistenable, these two are the only things that ruin the album. And the final part on the instrumental ver. of You & Me it's pretty much a good ender, the piano part without Ayu's vocals made it very cute.
Overall, LOVE it's a good realease. :3