Forever sounds almost like Complete to me. It starts off slow, then to the emotional vocals. But the song is definitely gives it more a melodic sound to it.
Songs that I liked are Forever, Talk to me, Boys & Girls, and Day By Day. I definitely agree with you with the ratings.
This album is cutesy-pop. Not really my style of music, but that's soshi style lol. I would buy it if I were a more big fan of theirs.